Update to 2012.09.13 version of live555.

This resolves two issues with playback of RTSP-over-http streams from Foscam h.264 IP cameras.
Combined with a small fix to modules/demux/live55.cpp, VLC now plays 'rtsp://hostname/iphone/11?user:password&' from Foscam h.264 cameras.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/live555/SHA512SUMS

-9e1bbf5e662c160d05c21abdb89240d570a84ff603d9fc18b9232b7d533000d4798383d463fb4d81731bb4074fcde429c380751a2d5e551a49859ba999604395  live.2012.08.20.tar.gz
+344c29038e9882b3ad8678ceec7755aca5013e3b0821ca6b9d846cc1c926c1dc125b71dce91986b760793123ebff9f291aaf0dbfb3570721968f641a2b530c5d  live.2012.09.13.tar.gz

contrib/src/live555/rules.mak

 # live555
 
 #LIVEDOTCOM_URL := http://live555.com/liveMedia/public/live555-latest.tar.gz
-LIVE555_FILE := live.2012.08.20.tar.gz
+LIVE555_FILE := live.2012.09.13.tar.gz
 LIVEDOTCOM_URL := http://download.videolan.org/pub/contrib/live555/$(LIVE555_FILE)
 
 PKGS += live555