Fix more inconsistent line endings. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@321016 91177308-0d34-0410-b5e6-96231b3b80d8

Author: DimitryAndric

lib/builtins/CMakeLists.txt

@@ -516,7 +516,7 @@ else ()
     if (CAN_TARGET_${arch})
       # NOTE: some architectures (e.g. i386) have multiple names.  Ensure that
       # we catch them all.
-      set(_arch ${arch})
+      set(_arch ${arch})
       if("${arch}" STREQUAL "armv6m")
         set(_arch "arm|armv6m")
       elseif("${arch}" MATCHES "^(armhf|armv7|armv7s|armv7k|armv7m|armv7em)$")