Remove -Wcast-qual as it's inherited from llvm since r221913.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221914 91177308-0d34-0410-b5e6-96231b3b80d8

CMakeLists.txt

@@ -240,7 +240,7 @@ configure_file(
 
 # Add appropriate flags for GCC
 if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-common -Woverloaded-virtual -Wcast-qual -fno-strict-aliasing")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-common -Woverloaded-virtual -fno-strict-aliasing")
 
   # Enable -pedantic for Clang even if it's not enabled for LLVM.
   if (NOT LLVM_ENABLE_PEDANTIC)