[clang] [llvm] Revert "Reapply "runtimes: Pass CMAKE_SYSTEM_NAME based on target triple" (#205133) (#205522)" (PR #208644)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-arm-ubuntu` running on `linaro-lldb-arm-ubuntu` while building `clang,cmake,llvm,runtimes` at step 6 "test".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/18/builds/26312

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test) failure: build (failure)
...
UNSUPPORTED: lldb-api :: functionalities/scripted_process/TestStackCoreScriptedProcess.py (664 of 2911)
UNSUPPORTED: lldb-api :: functionalities/scripted_process_empty_memory_region/TestScriptedProcessEmptyMemoryRegion.py (665 of 2911)
PASS: lldb-api :: functionalities/scripted_process/TestScriptedProcess.py (666 of 2911)
PASS: lldb-api :: functionalities/show_location/TestShowLocationDwarf5.py (667 of 2911)
UNSUPPORTED: lldb-api :: functionalities/set-data/TestSetData.py (668 of 2911)
PASS: lldb-api :: functionalities/signal/handle-abrt/TestHandleAbort.py (669 of 2911)
PASS: lldb-api :: functionalities/signal/TestSendSignal.py (670 of 2911)
PASS: lldb-api :: functionalities/signal/handle-segv/TestHandleSegv.py (671 of 2911)
PASS: lldb-api :: functionalities/signal/raise/TestRaise.py (672 of 2911)
PASS: lldb-api :: functionalities/source-map/TestTargetSourceMap.py (673 of 2911)
FAIL: lldb-api :: functionalities/scripted_frame_provider/circular_dependency/TestFrameProviderCircularDependency.py (674 of 2911)
******************** TEST 'lldb-api :: functionalities/scripted_frame_provider/circular_dependency/TestFrameProviderCircularDependency.py' FAILED ********************
Script:
--
/usr/bin/python3.10 /home/tcwg-buildbot/worker/lldb-arm-ubuntu/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./lib --env LLVM_INCLUDE_DIR=/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/include --env LLVM_TOOLS_DIR=/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin --triple armv8l-unknown-linux-gnueabihf --build-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/lldb-test-build --lldb-module-cache-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/lldb-test-build/module-cache-lldb/lldb-api --clang-module-cache-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/lldb-test-build/module-cache-clang/lldb-api --executable /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin/lldb --lldb-python-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/local/lib/python3.10/dist-packages --compiler /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin/clang --dsymutil /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin --lldb-obj-root /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/tools/lldb --lldb-libs-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./lib --cmake-build-type Release /home/tcwg-buildbot/worker/lldb-arm-ubuntu/llvm-project/lldb/test/API/functionalities/scripted_frame_provider/circular_dependency -p TestFrameProviderCircularDependency.py
--
Exit Code: 1

Command Output (stdout):
--
Skipping the following test categories: libc++, msvcstl, dsym, pdb, gmodules, debugserver, objc

--
Command Output (stderr):
--
FAIL: LLDB (/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/bin/clang-arm) :: test_circular_dependency_evaluate_expression_in_get_frame (TestFrameProviderCircularDependency.FrameProviderCircularDependencyTestCase)
Log Files:
 - /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/lldb-test-build/functionalities/scripted_frame_provider/circular_dependency/TestFrameProviderCircularDependency/Failure_test_circular_dependency_evaluate_expression_in_get_frame.log
PASS: LLDB (/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/bin/clang-arm) :: test_circular_dependency_handle_command_in_init (TestFrameProviderCircularDependency.FrameProviderCircularDependencyTestCase)
PASS: LLDB (/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/bin/clang-arm) :: test_circular_dependency_with_function_replacement (TestFrameProviderCircularDependency.FrameProviderCircularDependencyTestCase)
======================================================================
FAIL: test_circular_dependency_evaluate_expression_in_get_frame (TestFrameProviderCircularDependency.FrameProviderCircularDependencyTestCase)
   Test that calling EvaluateExpression in get_frame_at_index doesn't
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/tcwg-buildbot/worker/lldb-arm-ubuntu/llvm-project/lldb/test/API/functionalities/scripted_frame_provider/circular_dependency/TestFrameProviderCircularDependency.py", line 204, in test_circular_dependency_evaluate_expression_in_get_frame
    self.assertIsNotNone(
AssertionError: unexpectedly None : Frame 1 should have function name
Config=arm-/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/bin/clang
----------------------------------------------------------------------
Ran 3 tests in 38.649s

FAILED (failures=1)

--

********************
PASS: lldb-api :: functionalities/stats_api/TestStatisticsAPI.py (675 of 2911)
PASS: lldb-api :: functionalities/scripted_frame_provider/TestScriptedFrameProvider.py (676 of 2911)

```

</details>

https://github.com/llvm/llvm-project/pull/208644