Add phony goal GET-INSTALL-PATH

It can be used as a goal of mm/mmm.
It prints out modules' install paths, which can be used by the runtest
utility.

Change-Id: If113e4c990b672acbacf723104583c0157d43c3b
diff --git a/core/main.mk b/core/main.mk
index 7ba9a7f..5522867 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -471,6 +471,12 @@
 NOTICE-HOST-%: ;
 NOTICE-TARGET-%: ;
 
+# A helper goal printing out install paths
+.PHONY: GET-INSTALL-PATH
+GET-INSTALL-PATH:
+	@$(foreach m, $(ALL_MODULES), $(if $(ALL_MODULES.$(m).INSTALLED), \
+		echo 'INSTALL-PATH: $(m) $(ALL_MODULES.$(m).INSTALLED)';))
+
 else # ONE_SHOT_MAKEFILE
 
 #