[SCM] libav/experimental: import my new signing key

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 857a589a2beedd7db2d9350171c7c1c4513380a9
Author: Reinhard Tartler <siretart at tauware.de>
Date:   Sun Mar 23 14:19:40 2014 -0400

    import my new signing key

diff --git a/debian/upstream-signing-key.pgp b/debian/upstream-signing-key.pgp
index 7f4fe40..3b01536 100644
Binary files a/debian/upstream-signing-key.pgp and b/debian/upstream-signing-key.pgp differ

-- 
Libav/FFmpeg packaging