[clang] [clang][PowerPC] Add flag to enable compatibility with GNU for complex arguments (PR #77732)

[Aaron Ballman via cfe-commits]

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@@ -0,0 +1,9 @@
+// RUN: %clang -c --target=ppc32 -fcomplex-ppc-gnu-abi %s 2>&1
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AaronBallman wrote:

It'd be nice for this to check `-###` output to ensure that it's passing along the correct `-cc1` option.

https://github.com/llvm/llvm-project/pull/77732