[CMake] Need to filter ${arch}/*.c builtins as well as ${arch}/*.S builtins.

This was broken in r248542 when I refactored this to support builtins where ${arch} didn't match the directory prefix (i.e. armv7s).

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@252365 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/Modules/CompilerRTDarwinUtils.cmake b/cmake/Modules/CompilerRTDarwinUtils.cmake
index c52ba09..97b0ea4 100644
--- a/cmake/Modules/CompilerRTDarwinUtils.cmake
+++ b/cmake/Modules/CompilerRTDarwinUtils.cmake
@@ -220,7 +220,7 @@
     list(FIND ${excluded_list} ${_name_we} _found)
     if(_found ${filter_action} ${filter_value})
       list(REMOVE_ITEM intermediate ${_file})
-    elseif(${_file} MATCHES ".*/.*\\.S")
+    elseif(${_file} MATCHES ".*/.*\\.S" OR ${_file} MATCHES ".*/.*\\.c")
       get_filename_component(_name ${_file} NAME)
       string(REPLACE ".S" ".c" _cname "${_name}")
       list(REMOVE_ITEM intermediate ${_cname})