[clang] [clang][Driver] Handle ROCm installation layout of lib/llvm/bin/clang (PR #138928)

[Matt Arsenault via cfe-commits]

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@@ -181,8 +181,15 @@ RocmInstallationDetector::getInstallationPathCandidates() {
 
     // Some versions of the rocm llvm package install to /opt/rocm/llvm/bin
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arsenm wrote:

Doesn't this end up being the clang resource directory? Why do we need additional handling? 

https://github.com/llvm/llvm-project/pull/138928