Export template_dir in Makefile.
Export template_dir in Makefile.

If somebody set template_dir in config.mak. Then git-init-db would be
compiled with the correct location but the templates would be installed
in the default location. Fix it.

Signed-off-by: Tom Prince <13cded1f3a11b8469f2006f98a6fbe2e3c00416f@ualberta.net>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git