Add a rule that builds an eclipse project file for an app.

Type make ECLIPSE-<app1>-<app2>... with the apps as listed in LOCAL_PACKAGE_NAME.

Change-Id: Ieb96dfc9dfc13bdf1b3be53572092fc7bc695869
diff --git a/core/main.mk b/core/main.mk
index d9e8dd8..f52b473 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -49,6 +49,10 @@
 DEFAULT_GOAL := droid
 $(DEFAULT_GOAL):
 
+# Used to force goals to build.  Only use for conditionally defined goals.
+.PHONY: FORCE
+FORCE:
+
 # Set up various standard variables based on configuration
 # and host information.
 include $(BUILD_SYSTEM)/config.mk