[compiler-rt] Split cflags and link flags to avoid warnings

Summary:
The MSVC compiler is complaining about invalid flags. The CFLAGS are passed
to the linker (i.e. /Gy-, ...).

Reviewers: rnk

Subscribers: llvm-commits, kubabrecka, chrisha

Differential Revision: http://reviews.llvm.org/D21554

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@273265 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/Modules/AddCompilerRT.cmake b/cmake/Modules/AddCompilerRT.cmake
index f434543..061c15d 100644
--- a/cmake/Modules/AddCompilerRT.cmake
+++ b/cmake/Modules/AddCompilerRT.cmake
@@ -106,7 +106,8 @@
         set(output_name_${libname} ${libname}${COMPILER_RT_OS_SUFFIX})
       else()
         set(libname "${name}-dynamic-${arch}")
-        set(extra_linkflags_${libname} ${TARGET_${arch}_CFLAGS} ${LIB_CFLAGS} ${LIB_LINKFLAGS})
+        set(extra_cflags_${libname} ${TARGET_${arch}_CFLAGS} ${LIB_CFLAGS})
+        set(extra_linkflags_${libname} ${TARGET_${arch}_LINKFLAGS} ${LIB_LINKFLAGS})
         if(WIN32)
           set(output_name_${libname} ${name}_dynamic-${arch}${COMPILER_RT_OS_SUFFIX})
         else()