Use 'RC_XBS' instead of 'RC_BUILDIT' to catch all times when it's built in the Apple way.

llvm-svn: 175070

clang/tools/libclang/Makefile

@@ -57,7 +57,7 @@ ifeq ($(HOST_OS),Darwin)
     endif
 
     # If we're doing an Apple-style build, add the LTO object path.
-    ifeq ($(RC_BUILDIT),YES)
+    ifeq ($(RC_XBS),YES)
        TempFile        := $(shell mkdir -p ${OBJROOT}/dSYMs ; mktemp ${OBJROOT}/dSYMs/clang-lto.XXXXXX)
        LLVMLibsOptions += -Wl,-object_path_lto -Wl,$(TempFile)
     endif