git-gui: Use builtin version of 'git gc'.
-rw-r--r-- 36 .gitignore
-rwxr-xr-x 745 GIT-VERSION-GEN
-rw-r--r-- 1200 Makefile
-rw-r--r-- 1659 TODO
-rwxr-xr-x 115090 git-gui.sh