Move gcov output to /data/misc/trace

Gcov output location has world write on debuggable builds.

Test: N/A
Bug: 128524141
Change-Id: Ia6b94e26352dd66f5c6819f6157b4b73dd777a90
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 5d307b8..462ae8b 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -89,7 +89,7 @@
 
 EXPORT_GLOBAL_GCOV_OPTIONS :=
 ifeq ($(NATIVE_COVERAGE),true)
-  EXPORT_GLOBAL_GCOV_OPTIONS := export GCOV_PREFIX /data/misc/gcov
+  EXPORT_GLOBAL_GCOV_OPTIONS := export GCOV_PREFIX /data/misc/trace
 endif
 
 # Put it here instead of in init.rc module definition,