[llvm][test] Skip object-property.ll debug-info test on AIX

Fails with:
```
******************** TEST 'LLVM :: DebugInfo/Generic/objc-property.ll' FAILED ********************
Exit Code: 2
Command Output (stdout):
--
RUN: at line 1
ome/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/build/bin/llc -filetype=obj -o - /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/test/DebugInfo/Generic/objc-property.ll | /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/build/bin/llvm-dwarfdump --debug-info - | /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/build/bin/FileCheck /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/test/DebugInfo/Generic/objc-property.ll
executed command: /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/build/bin/llc -filetype=obj -o - /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/test/DebugInfo/Generic/objc-property.ll
.---command stderr------------
| Assertion failed: Section && "Cannot switch to a null section!", file  /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/lib/MC/MCStreamer.cpp, line 1364, virtual void llvm::MCStreamer::switchSection(MCSection *, uint32_t)()
| PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
| Stack dump:
| 0.	Program arguments: /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/build/bin/llc -filetype=obj -o - /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/test/DebugInfo/Generic/objc-property.ll
`-----------------------------
error: command failed with exit status: -6
executed command: /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/build/bin/llvm-dwarfdump --debug-info -
.---command stderr------------
| error: -: The file was not recognized as a valid object file
`-----------------------------
error: command failed with exit status: 1
executed command: /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/build/bin/FileCheck /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/test/DebugInfo/Generic/objc-property.ll
.---command stderr------------
| FileCheck error: '<stdin>' is empty.
| FileCheck command line:  /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/build/bin/FileCheck /home/llvm/llvm-external-buildbots/workers/aix-ppc64/clang-ppc64-aix/llvm-project/llvm/test/DebugInfo/Generic/objc-property.ll
`-----------------------------
error: command failed with exit status: 2
```

Presumably due to unsupported debug-info section (see
#71814)

Author: Michael137

llvm/test/DebugInfo/Generic/objc-property.ll

@@ -1,3 +1,5 @@
+; UNSUPPORTED:  target={{.*}}-aix{{.*}}
+;
 ; RUN: llc -filetype=obj -o - %s | llvm-dwarfdump --debug-info - | FileCheck %s
 
 ; CHECK: DW_TAG_structure_type