[gwpAsan] revert minor change

This change reverts a small cmake change that was causing buildbot
failures.

Differential Revision: https://reviews.llvm.org/D107510

Author: michaelrj-google

compiler-rt/lib/gwp_asan/CMakeLists.txt

@@ -33,10 +33,10 @@ set(GWP_ASAN_HEADERS
 # Ensure that GWP-ASan meets the delegated requirements of some supporting
 # allocators. Some supporting allocators (e.g. scudo standalone) cannot use any
 # parts of the C++ standard library.
-set(GWP_ASAN_CFLAGS -fno-rtti -fno-exceptions
+set(GWP_ASAN_CFLAGS ${SANITIZER_COMMON_CFLAGS} -fno-rtti -fno-exceptions
     -nostdinc++ -pthread -fno-omit-frame-pointer)
 append_list_if(COMPILER_RT_HAS_FPIC_FLAG -fPIC GWP_ASAN_CFLAGS)
-append_list_if(COMPILER_RT_HAS_SANITIZER_COMMON, ${SANITIZER_COMMON_CFLAGS} GWP_ASAN_CFLAGS)
+# append_list_if(COMPILER_RT_HAS_SANITIZER_COMMON ${SANITIZER_COMMON_CFLAGS} GWP_ASAN_CFLAGS)
 
 # Remove -stdlib= which is unused when passing -nostdinc++.
 string(REGEX REPLACE "-stdlib=[a-zA-Z+]*" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})