Merge pull request swiftlang#538 from xiaobai/fix-build-new-flag

[build] Silence `-Wvoid-pointer-to-int-cast`

Author: benlangmuir

cmake/modules/DispatchCompilerWarnings.cmake

@@ -62,6 +62,7 @@ else()
   add_compile_options($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:-Wno-unreachable-code-aggressive>)
   add_compile_options($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:-Wno-unused-macros>)
   add_compile_options($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:-Wno-used-but-marked-unused>)
+  add_compile_options($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:-Wno-void-pointer-to-int-cast>)
   add_compile_options($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:-Wno-vla>)
 
   if(CMAKE_SYSTEM_NAME STREQUAL Android)