gcampax/gtk-js-app — pull request #8 by ueno (2014-11-24 09:06:41+00:00)
Title: build: Guard git.mk inclusion for distribution tarball

git.mk is not supposed to be listed in EXTRA_DIST:
https://github.com/behdad/git.mk/blob/master/git.mk#L43
Avoid error when the file doesn't exist.

(Note: automake implicitly adds sub-Makefile to EXTRA_DIST if it is included through "include" not "-include".)