[llvm] [PowerPC] add PowerPC path for PR labeler (PR #82200)

[Kai Luo via llvm-commits]

================
@@ -822,6 +822,23 @@ backend:X86:
   - llvm/lib/TargetParser/X86*
   - llvm/utils/TableGen/X86*
 
+backend:PowerPC:
+  - llvm/include/llvm/IR/IntrinsicsPowerPC.td
+  - llvm/lib/Target/PowerPC/**
+  - llvm/test/CodeGen/PowerPC/**
----------------
bzEq wrote:

For tests, can we use `llvm/test/**/PowerPC/**` and `llvm/test/**/XCOFF/**`?
I assume we are also interested in
```
llvm/test/DebugInfo/Symbolize/XCOFF
llvm/test/DebugInfo/XCOFF
llvm/test/MC/XCOFF
llvm/test/tools/llvm-dwarfdump/XCOFF
llvm/test/tools/llvm-nm/XCOFF
llvm/test/tools/llvm-objcopy/XCOFF
llvm/test/tools/llvm-objdump/XCOFF
llvm/test/tools/llvm-readobj/XCOFF
llvm/test/tools/obj2yaml/XCOFF
llvm/test/tools/yaml2obj/XCOFF
llvm/test/Analysis/CostModel/PowerPC
llvm/test/Analysis/LoopCacheAnalysis/PowerPC
llvm/test/CodeGen/MIR/PowerPC
llvm/test/CodeGen/PowerPC
llvm/test/DebugInfo/PowerPC
llvm/test/ExecutionEngine/RuntimeDyld/PowerPC
llvm/test/Instrumentation/MemorySanitizer/PowerPC
llvm/test/LTO/PowerPC
llvm/test/MC/Disassembler/PowerPC
llvm/test/MC/PowerPC
llvm/test/Transforms/AtomicExpand/PowerPC
llvm/test/Transforms/CodeGenPrepare/PowerPC
llvm/test/Transforms/ConstantHoisting/PowerPC
llvm/test/Transforms/DivRemPairs/PowerPC
llvm/test/Transforms/EarlyCSE/PowerPC
llvm/test/Transforms/GlobalOpt/PowerPC
llvm/test/Transforms/Inline/PowerPC
llvm/test/Transforms/InstCombine/PowerPC
llvm/test/Transforms/LoopDataPrefetch/PowerPC
llvm/test/Transforms/LoopUnroll/PowerPC
llvm/test/Transforms/LoopVectorize/PowerPC
llvm/test/Transforms/SLPVectorizer/PowerPC
llvm/test/Transforms/SimplifyCFG/PowerPC
llvm/test/tools/gold/PowerPC
llvm/test/tools/llvm-exegesis/PowerPC
llvm/test/tools/llvm-objdump/ELF/PowerPC
```

https://github.com/llvm/llvm-project/pull/82200