Store symbols.zip in apps_only build.

Bug: 18103055
Change-Id: I0eb335e944138b0edc3050d19c076891f499a07c
diff --git a/core/main.mk b/core/main.mk
index 749929a..9d6e233 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -936,6 +936,9 @@
   $(PROGUARD_DICT_ZIP) : $(apps_only_installed_files)
   $(call dist-for-goals,apps_only, $(PROGUARD_DICT_ZIP))
 
+  $(SYMBOLS_ZIP) : $(apps_only_installed_files)
+  $(call dist-for-goals,apps_only, $(SYMBOLS_ZIP))
+
 .PHONY: apps_only
 apps_only: $(unbundled_build_modules)