[samba4] Update source for alpha21.

[asn]

commit 2d877b1b5147f3228782588d2fde8b25a1d2c935
Author: Andreas Schneider <asn at cryptomilk.org>
Date:   Wed May 30 17:25:54 2012 +0200

    Update source for alpha21.

 .gitignore |    1 +
 sources    |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 3eb8912..e73c09b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ samba-4.0.0alpha11.tar.gz
 /samba-4.0.0alpha15-GIT-3560db3.tar.gz
 /samba-4.0.0alpha15-GIT-a6a722b.tar.gz
 /samba-4.0.0alpha18.tar.bz2
+/samba-4.0.0alpha21.tar.bz2
diff --git a/sources b/sources
index 503fffd..0ea830b 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-8a0ae605b5e7d6963fa65e74eb8640b3  samba-4.0.0alpha18.tar.bz2
+fdbad6688083c77618c528b5a1d60961  samba-4.0.0alpha21.tar.bz2