[InstrProf][NFC] Ignore -Wcast-qual after D153911 to fix build failure on AIX

/scratch/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/llvm-project/compiler-rt/lib/profile/InstrProfilingPlatformAIX.c:202:40: error: cast from 'const int (*)[0]' to 'void *' drops const qualifier [-Werror,-Wcast-qual]
                               (void *)&dummy_name, (void *)&dummy_vnds};
                                       ^
1 error generated.