[libc] [llvm] [LLVM] Make the GPU loader utilities an LLVM tool (PR #132096)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-latest-gcc` running on `linaro-flang-aarch64-latest-gcc` while building `libc,llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/130/builds/11403

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
107.080 [185/6/7227] Linking CXX shared library lib/libFIROpenACCSupport.so.21.0git
107.087 [184/6/7228] Creating library symlink lib/libFIROpenACCSupport.so
107.259 [182/7/7229] Linking CXX shared library lib/libFIRTestOpenACCInterfaces.so.21.0git
107.266 [181/7/7230] Creating library symlink lib/libFIRTestOpenACCInterfaces.so
107.306 [181/6/7231] Building CXX object tools/llvm-gpu-loader/CMakeFiles/llvm-gpu-loader.dir/llvm-gpu-loader.cpp.o
../llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.cpp: In function ‘int main(int, const char**, const char**)’:
../llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.cpp:132:20: warning: unused variable ‘params’ [-Wunused-variable]
  132 |   LaunchParameters params{threads_x, threads_y, threads_z,
      |                    ^~~~~~
107.388 [180/6/7232] Linking CXX executable bin/llvm-gpu-loader
FAILED: bin/llvm-gpu-loader 
: && /usr/local/bin/c++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -Wl,-rpath-link,/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/./lib  -Wl,--gc-sections tools/llvm-gpu-loader/CMakeFiles/llvm-gpu-loader.dir/llvm-gpu-loader.cpp.o -o bin/llvm-gpu-loader  -Wl,-rpath,"\$ORIGIN/../lib:/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/lib:"  lib/libLLVMOption.so.21.0git  lib/libLLVMFrontendOffloading.so.21.0git  lib/libLLVMObject.so.21.0git  lib/libLLVMBinaryFormat.so.21.0git  lib/libLLVMSupport.so.21.0git  -Wl,-rpath-link,/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/lib && :
/usr/bin/ld: tools/llvm-gpu-loader/CMakeFiles/llvm-gpu-loader.dir/llvm-gpu-loader.cpp.o: undefined reference to symbol '_ZN4llvm6Triple15getArchTypeNameENS0_8ArchTypeE'
/usr/bin/ld: /home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/./lib/libLLVMTargetParser.so.21.0git: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
107.564 [180/5/7233] Linking CXX shared library lib/libFIRTransforms.so.21.0git
107.618 [180/4/7234] Linking CXX shared library lib/libFlangOpenMPTransforms.so.21.0git
108.318 [180/3/7235] Linking CXX shared library lib/libFortranSemantics.so.21.0git
108.325 [180/2/7236] Linking CXX executable bin/fir-lsp-server
162.120 [180/1/7237] Building CXX object tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/cmake_pch.hxx.gch
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/132096