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

[Qiu Chaofan via llvm-commits]

================
@@ -822,6 +822,27 @@ backend:X86:
   - llvm/lib/TargetParser/X86*
   - llvm/utils/TableGen/X86*
 
+backend:PowerPC:
+  - llvm/include/llvm/IR/IntrinsicsPowerPC.td
----------------
ecnelises wrote:

```
llvm/include/llvm/BinaryFormat/ELFRelocs/PowerPC.def
llvm/include/llvm/BinaryFormat/ELFRelocs/PowerPC64.def
```

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