Support dist-ing the userdatatarball

So that we can get to the contents of userdata from the build server
without extracting the image.

Bug: 27719200
Test: m userdatatarball dist
Change-Id: I1438597bd29df80665571f7dc3b4957b9adde870
diff --git a/core/Makefile b/core/Makefile
index 8885172..1d13e7e 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1428,6 +1428,8 @@
 $(INSTALLED_USERDATATARBALL_TARGET): $(FS_GET_STATS) $(INTERNAL_USERDATAIMAGE_FILES)
 	$(build-userdatatarball-target)
 
+$(call dist-for-goals,userdatatarball,$(INSTALLED_USERDATATARBALL_TARGET))
+
 .PHONY: userdatatarball-nodeps
 userdatatarball-nodeps: $(FS_GET_STATS)
 	$(build-userdatatarball-target)