Revert "Use -target-feature for MTE"

Revert submission 3493411-target_feature_mte

Reason for revert: The infrastructure upgrades necessary to support
this change still have not been completed. To submit this change,
re-client needs to be upgraded to v0.170 or greater.

Reverted changes: /q/submissionid:3493411-target_feature_mte
Bug: 366222162
Bug: 399925046

Change-Id: Id9ddce2546f6db1386d98fac44046f21878268d0
diff --git a/core/config_sanitizers.mk b/core/config_sanitizers.mk
index c0f2c68..ab2d5c1 100644
--- a/core/config_sanitizers.mk
+++ b/core/config_sanitizers.mk
@@ -284,9 +284,9 @@
 ifneq ($(filter memtag_stack,$(my_sanitize)),)
   my_cflags += -fsanitize=memtag-stack
   my_ldflags += -fsanitize=memtag-stack
-  my_cflags += -Xclang -target-feature -Xclang +mte
-  my_ldflags += -Xclang -target-feature -Xclang +mte
-  my_asflags += -Xclang -target-feature -Xclang +mte
+  my_cflags += -march=armv8a+memtag
+  my_ldflags += -march=armv8a+memtag
+  my_asflags += -march=armv8a+memtag
   my_sanitize := $(filter-out memtag_stack,$(my_sanitize))
 endif