[clang] Updating tests for usage of CLANG_RESOURCE_DIR (clang/test/Driver/driverkit-path.c) (1/4) (PR #197154)

[Carlo Cabrera via cfe-commits]

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@@ -412,6 +412,11 @@ def calculate_arch_features(arch_string):
 if config.enable_threads:
     config.available_features.add("thread_support")
 
+# Add clang resource directory as a substitution
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carlocab wrote:

The difficulty might be is that, IIRC, `CLANG_RESOURCE_DIR` can be a path relative to the `clang` binary. In that case checking `clang -print-resource-dir` might be simplest, or we can reconstruct it from where we expect `clang` to be.

https://github.com/llvm/llvm-project/pull/197154