[gtk+] Mention writable git location, too

[Matthias Clasen <matthiasc src gnome org>]

commit d79a25a0dbb6b9078bb3e963178aa749d0d113c4
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Apr 7 19:20:53 2009 -0400

    Mention writable git location, too
---
 HACKING |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/HACKING b/HACKING
index 54c2bae..fe85e73 100644
--- a/HACKING
+++ b/HACKING
@@ -32,6 +32,11 @@ gtk+ and glib. You can do the following to get glib and gtk+ from GIT:
         $ git clone git://git.gnome.org/atk
         $ git clone git://git.gnome.org/gtk+
 
+Note: if you plan to push changes to back to the master repository and
+have a gnome account, you want to use the following instead:
+
+        $ git clone ssh://<username>@git.gnome.org/git/gtk+
+
 To compile the GIT version of gtk+ on your system, you will need to take
 several steps to setup the tree for compilation.  You can do all these
 steps at once by running: