Makefile.in, make sure that the git hooks are set

git hooks used to be set by virtue of calling ./g clone
but recent changes means that ./g is not always called
these day, so it is possible to end-up with no hooks.

Change-Id: I630066ee0e2961b93ddfbf177eb4e5fc09505911

Makefile.in

@@ -232,6 +232,7 @@ else # space-saving clone from another local workdir
 	git submodule update $(GIT_NEEDED_SUBMODULES)
 endif
 endif
+	cd $(SRCDIR) && ./g -z # make sure the git hooks are in place enven if no submodules are needed
 
 else # these sources are from a tarball, so get the other source tarballs
 gb_LO_VER := $(shell . $(SRCDIR)/sources.ver && echo $$lo_sources_ver)