Contrib: update live555

Close #7786
(cherry picked from commit 03f571782b24d486ab5c75cfb748dca736bc448e)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/live555/SHA512SUMS

-344c29038e9882b3ad8678ceec7755aca5013e3b0821ca6b9d846cc1c926c1dc125b71dce91986b760793123ebff9f291aaf0dbfb3570721968f641a2b530c5d  live.2012.09.13.tar.gz
+d3506851058c79eac35a0682d3fb344da1d4f22456d7df2b775ca693d361124ea4f62973ae936596e25e26bc3e7a11ae6028975a2f9e86aececf6e1735db604c  live.2012.12.18.tar.gz

contrib/src/live555/rules.mak

 # live555
 
 #LIVEDOTCOM_URL := http://live555.com/liveMedia/public/live555-latest.tar.gz
-LIVE555_FILE := live.2012.09.13.tar.gz
+LIVE555_FILE := live.2012.12.18.tar.gz
 LIVEDOTCOM_URL := http://download.videolan.org/pub/contrib/live555/$(LIVE555_FILE)
 
 PKGS += live555