[folks] Add policy for keeping the build healthy.

[Travis Reitter <treitter src gnome org>]

commit 053d6482edea8d1b9b36d121b6ae67c0d29af17f
Author: Travis Reitter <travis reitter collabora co uk>
Date:   Fri Jan 14 09:47:01 2011 -0800

    Add policy for keeping the build healthy.

 HACKING |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/HACKING b/HACKING
index 051a49c..d2d5a8f 100644
--- a/HACKING
+++ b/HACKING
@@ -106,3 +106,13 @@ Vala-specific rules
     package symbols like 'package_name.symbol'.
 
     This makes scope immediately clear, helping readability.
+
+Build health
+============
+
+1.  Before pushing commits to the mainline branch, the final commit in the
+    series must successfully build and pass 'make check' consistently.
+
+2.  After commits have been pushed to mainline, all buildbots must successfully
+    build and pass 'make check' on their next build of Folks. It's up to the
+    committer to ensure this requirement is met and make necessary changes.