[libcxx] [libcxxabi] [libunwind] [NFC][libc++][libc++abi][libunwind][test] Fix/unify AIX triples used in LIT tests (PR #101196)

[Xing Xue via cfe-commits]

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@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-// REQUIRES: target={{powerpc.*-ibm-aix.*}}
+// REQUIRES: target={{.+}}-aix{{.*}}
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xingxue-ibm wrote:

I see what you mean, thanks! I can do it if we think it is better to move them out of the `vendor/ibm` directory.

https://github.com/llvm/llvm-project/pull/101196