Set default to Clang integrated assembler.

BUG: 17820427
Change-Id: I10a6ddd94aad083665164d7939990e148b3b6efb
diff --git a/core/clang/arm64.mk b/core/clang/arm64.mk
index 9fb3670..ab395b3 100644
--- a/core/clang/arm64.mk
+++ b/core/clang/arm64.mk
@@ -1,10 +1,8 @@
 # Clang flags for arm64 arch, target or host.
 
-CLANG_CONFIG_arm64_EXTRA_ASFLAGS := \
-  -no-integrated-as
+CLANG_CONFIG_arm64_EXTRA_ASFLAGS :=
 
-CLANG_CONFIG_arm64_EXTRA_CFLAGS := \
-  -no-integrated-as
+CLANG_CONFIG_arm64_EXTRA_CFLAGS :=
 
 CLANG_CONFIG_arm64_EXTRA_LDFLAGS :=