[latexila] Mention jhbuild in HACKING

[SÃbastien Wilmet <swilmet src gnome org>]

commit ec5e59496b5d5908412f8b9655761fab1e9528ec
Author: SÃbastien Wilmet <swilmet gnome org>
Date:   Fri Nov 2 23:23:38 2012 +0100

    Mention jhbuild in HACKING

 HACKING |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/HACKING b/HACKING
index c78fef3..657c7fa 100644
--- a/HACKING
+++ b/HACKING
@@ -18,6 +18,7 @@ Later, to take the new commits you just have to do:
 
     $ git pull
 
+An easy way to build LaTeXila and its dependencies is to use jhbuild.
 
 If you want to contribute to LaTeXila, contact the main developer (see the
 file AUTHORS).