Fix variable naming style in PPCBoolRetToInt.cpp (#144533) Change loop variable 'i' to 'I' to conform to LLVM coding standards. Variable names should start with an upper case letter according to LLVM coding guidelines. Fixed locations: Lines 103-104: for loop variable and usage Lines 257-258: for loop variable and usage Co-authored-by: Shuqi Liang <Shuqi.Liang@ibm.com> GitOrigin-RevId: e6f98ff4a81d6e6b66e164fe799cb5ef87b95682