Emma support for host Java libraries.

To run emma on a host Java library, in the module definition use:
LOCAL_EMMA_INSTRUMENT := true
then run make with "EMMA_INSTRUMENT=true".

Bug: 12178695
Change-Id: Ie31582b94f5c45381f534912e810f88d21dde9b2
diff --git a/core/Makefile b/core/Makefile
index 40293ef..59432be 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1430,7 +1430,7 @@
 # the dependency will be set up later in build/core/main.mk.
 $(EMMA_META_ZIP) :
 	@echo "Collecting Emma coverage meta files."
-	$(hide) find $(TARGET_COMMON_OUT_ROOT) -name "coverage.em" | \
+	$(hide) find $(TARGET_COMMON_OUT_ROOT) $(HOST_COMMON_OUT_ROOT) -name "coverage.em" | \
 		zip -@ -q $@
 
 endif # EMMA_INSTRUMENT=true