build: Distribute libglnx and bsdiff Makefile templates
build: Distribute libglnx and bsdiff Makefile templates

In order to re-run autogen.sh from the tarball, the libglnx and bsdiff
Makefile templates need to be provided.

Closes: #372
Approved by: cgwalters

gatispaeglis/ostree,gatispaeglis/ostree,GNOME/ostree,GNOME/ostree,gatispaeglis/ostree,GNOME/ostree,gatispaeglis/ostree,gatispaeglis/ostree,GNOME/ostree,GNOME/ostree,gatispaeglis/ostree