[builtins] Include GENERIC_SOURCES in arm_SOURCES for MinGW

It is included in the built sources for all other arches supported
for MinGW currently, except for arm.

Differential Revision: https://reviews.llvm.org/D39938

llvm-svn: 318139

compiler-rt/lib/builtins/CMakeLists.txt

@@ -420,6 +420,7 @@ if(MINGW)
       udivsi3.c
       umoddi3.c
       emutls.c)
+  filter_builtin_sources(arm_SOURCES EXCLUDE arm_SOURCES "${arm_SOURCES};${GENERIC_SOURCES}")
 elseif(NOT WIN32)
   # TODO the EABI sources should only be added to EABI targets
   set(arm_SOURCES