[llvm] [LLVM][CMake] Build examples for llvm-test-depends (PR #171998)

[Alexis Engelke via llvm-commits]

aengelke wrote:

More failures, fixed with #172147:

- clang-s390x-linux, clang-s390x-linux-lnt: test/Examples/OrcV2Examples/lljit-with-remote-debugging.test requires JITLink, fix by adding `target=s390{{.*}}` to unsupported.
- clang-riscv-rva23-evl-vec-2stage, clang-riscv-rva20-2stage: Kaleidoscope tests fail with errors like `JIT session error: Symbols not found: [ __adddf3 ]` (or __gedf2 etc.), fix by marking riscv as unsupported.
- ppc64le-mlir-rhel-clang: timeout, unrelated

https://github.com/llvm/llvm-project/pull/171998