Use GCC on ARM64

This automatically enables the computed-goto interpreter as default.

Bug: 15763315
Bug: 15405621
Change-Id: I4f6ed5f7cad96333bc8dc1029e9b90ba1b6916df
diff --git a/build/Android.common.mk b/build/Android.common.mk
index 09f34b3..f916e1e 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -134,7 +134,7 @@
 # Clang on the target: only enabled for ARM64. Target builds use GCC by default.
 ART_TARGET_CLANG :=
 ART_TARGET_CLANG_arm :=
-ART_TARGET_CLANG_arm64 := true
+ART_TARGET_CLANG_arm64 :=
 ART_TARGET_CLANG_mips :=
 ART_TARGET_CLANG_x86 :=
 ART_TARGET_CLANG_x86_64 :=