[clang] XFAIL clang/Driver/test/compress.c on AIX (PR #87269)

[via cfe-commits]

azhan92 wrote:

> Can you edit the description to state which command fails on AIX?
> 
> These tests all contain `-###` to stop after clangDriver completes. And `clang --target=powerpc-ibm-aix -fintegrated-as -Wa,-compress-debug-sections -c a.c '-###'` seems to work for me.
> 
> We have other tests that rely on the integrated assembler, so I'd be surprised if this is the only test failing on AIX.

It should be this command that's failing: `RUN: %clang -### -fintegrated-as -gz -c %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ %s`. I also added it to the description. The other tests that were failing due to the integrated assembler were XFAIL'd in this [commit](https://github.com/llvm/llvm-project/commit/225cf64e03b4e394c32e95fe1d6414e6e16be094), but it seems like they missed this test since the buildbot doesn't run it (since it requires zlib). 

https://github.com/llvm/llvm-project/pull/87269