autospecnew: master branch should track origin/master

Because 'make koji' expects that master should track origin/master,
initialize the tracking branch during the autospecnew.

Signed-off-by: Patrick McCarty <patrick.mccarty@intel.com>

Makefile.toplevel

@@ -204,6 +204,7 @@ autospecnew: localreponotice
 			cd $(TOPLVL)/packages/$(NAME); \
 			git init; \
 			git remote add origin $(PKG_BASE_URL)/$(NAME); \
+			git branch -u origin/master master; \
 			$(call gitoliteurl,packages/$(NAME)); \
 			$(call subjectprefix,$(NAME)); \
 		); \