ART: remove gcc cruft from the makefiles

ART only builds with clang now, delete all logic to determine gcc
vs. clang, and move all LOCAL_CLANG_CFLAGS into LOCAL_CFLAGS.

Test: mma, make test-art-host, make test-art-target
Change-Id: I578615233ad3e71af18afb47bb11f3be8417216c
diff --git a/test/Android.libarttest.mk b/test/Android.libarttest.mk
index 7813d16..ec5b7d2 100644
--- a/test/Android.libarttest.mk
+++ b/test/Android.libarttest.mk
@@ -86,7 +86,7 @@
   LOCAL_ADDITIONAL_DEPENDENCIES := art/build/Android.common_build.mk
   LOCAL_ADDITIONAL_DEPENDENCIES += $(LOCAL_PATH)/Android.libarttest.mk
   ifeq ($$(art_target_or_host),target)
-    $(call set-target-local-clang-vars)
+    LOCAL_CLANG := $(ART_TARGET_CLANG)
     ifeq ($$(suffix),d)
       $(call set-target-local-cflags-vars,debug)
     else
@@ -109,7 +109,7 @@
       LOCAL_CFLAGS += $(ART_HOST_NON_DEBUG_CFLAGS)
       LOCAL_ASFLAGS += $(ART_HOST_NON_DEBUG_ASFLAGS)
     endif
-    LOCAL_LDLIBS := $(ART_HOST_LDLIBS) -ldl -lpthread
+    LOCAL_LDLIBS := -ldl -lpthread
     LOCAL_IS_HOST_MODULE := true
     LOCAL_MULTILIB := both
     include $(BUILD_HOST_SHARED_LIBRARY)