Do not specify -mmacosx-version-min if building for arm-apple-darwin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81240 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.rules b/Makefile.rules
index 5d1dc4b..fca687c 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -514,7 +514,10 @@
   DARWIN_MAJVERS := $(shell echo $(DARWIN_VERSION)| sed -E 's/10.([0-9]).*/\1/')
 
   SharedLinkOptions=-Wl,-flat_namespace -Wl,-undefined -Wl,suppress \
-                    -dynamiclib -mmacosx-version-min=$(DARWIN_VERSION)
+                    -dynamiclib
+  ifneq ($(ARCH),ARM)
+    SharedLinkOptions += -mmacosx-version-min=$(DARWIN_VERSION)
+  endif
 else
   ifeq ($(HOST_OS),Cygwin)
     SharedLinkOptions=-shared -nostdlib -Wl,--export-all-symbols \
@@ -525,7 +528,9 @@
 endif
 
 ifeq ($(TARGET_OS),Darwin)
-  TargetCommonOpts += -mmacosx-version-min=$(DARWIN_VERSION)
+  ifneq ($(ARCH),ARM)
+    TargetCommonOpts += -mmacosx-version-min=$(DARWIN_VERSION)
+  endif
 endif
 
 # Adjust LD.Flags depending on the kind of library that is to be built. Note