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/executable.mk b/core/executable.mk
index 0ce400c..70ef0d9 100644
--- a/core/executable.mk
+++ b/core/executable.mk
@@ -7,7 +7,7 @@
 # LOCAL_MODULE_STEM_64
 
 my_skip_this_target :=
-ifeq (address,$(strip $(SANITIZE_TARGET)))
+ifneq ($(filter address,$(SANITIZE_TARGET)),)
   ifeq (true,$(LOCAL_FORCE_STATIC_EXECUTABLE))
     my_skip_this_target := true
   else ifeq (false, $(LOCAL_CLANG))