Only build ARM-specific runtimes if ARM is enabled

The soft-float variants of (embedded) libclang_rt only make sense for ARM, so
there's no point in trying to build them if the compiler is only capable of
targeting x86.

llvm-svn: 197033

Author: TNorthover

clang/runtime/compiler-rt/Makefile

@@ -84,8 +84,13 @@ RuntimeLibrary.darwin.Configs := \
 	asan_osx_dynamic.dylib \
 	profile_osx.a profile_ios.a \
 	ubsan_osx.a
+
 RuntimeLibrary.darwin_embedded.Configs := \
-	soft_static.a hard_static.a soft_pic.a hard_pic.a
+	hard_static.a hard_pic.a
+ifneq (,$(findstring ARM,$(TARGETS_TO_BUILD)))
+RuntimeLibrary.darwin_embedded.Configs += \
+	soft_static.a soft_pic.a
+endif
 
 # Support building compiler-rt with relocatable SDKs.
 #