[llvm] [offload] Extend LIT infrastructure to allow using more tools (PR #124636)

[Nick Sarnie via llvm-commits]

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@@ -47,6 +47,19 @@ function(find_standalone_test_dependencies)
     set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
     return()
   endif()
+
+  find_program(OPENMP_LLVM_CONFIG_EXECUTABLE
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sarnex wrote:

Yeah this is just so I can add a test that does a real full OpenMP compile with the SPIR-V offload target, and then call `clang-offload-packager` and `llvm-readelf` on the output. 

https://github.com/llvm/llvm-project/pull/124636