Add support of SANITIZE_TARGET='address coverage' for fuzzing.

Also, add trace-cmp instrumentation to fuzz_test and host_fuzz_test.

Bug: 22850550
Change-Id: Ifff7b8be693ae991feb0a64e19439370a19b2748
diff --git a/core/host_fuzz_test.mk b/core/host_fuzz_test.mk
index e917959..cc7baad 100644
--- a/core/host_fuzz_test.mk
+++ b/core/host_fuzz_test.mk
@@ -3,7 +3,7 @@
 ## Common flags for host fuzz tests are added.
 ################################################
 
-LOCAL_CFLAGS += -fsanitize-coverage=edge,indirect-calls,8bit-counters
+LOCAL_CFLAGS += -fsanitize-coverage=edge,indirect-calls,8bit-counters,trace-cmp
 LOCAL_STATIC_LIBRARIES += libLLVMFuzzer
 
 include $(BUILD_HOST_EXECUTABLE)