[clang] [clang][AIX] Handle triple environment component for per target runtime directory (PR #140850)

[Daniel Chen via cfe-commits]

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@@ -16,6 +16,10 @@
 // RUN:        -resource-dir=%S/Inputs/resource_dir_with_per_target_subdir\
 // RUN:      | FileCheck --check-prefix=PRINT-RUNTIME-DIR64-PER-TARGET %s
 
+// RUN: %clang -print-runtime-dir --target=powerpc-ibm-aix-unknown \
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DanielCChen wrote:

The target should be without the `-unknown` part if the checking below uses `power-ibm-aix`.

https://github.com/llvm/llvm-project/pull/140850