package/tvheadend: bump version for libav fixes

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/tvheadend/tvheadend.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-TVHEADEND_VERSION           = 5513b44
+TVHEADEND_VERSION           = 6cb8eaa
 TVHEADEND_SITE              = git://github.com/tvheadend/tvheadend.git
 TVHEADEND_LICENSE           = GPLv3+
 TVHEADEND_LICENSE_FILES     = LICENSE