contrib: update libass

(cherry picked from commit 6520cc40)
Signed-off-by: Derk-Jan Hartman <hartman@videolan.org>

extras/contrib/src/packages.mak

@@ -226,7 +226,7 @@ OIL_VERSION=0.3.16
 OIL_URL=http://liboil.freedesktop.org/download/liboil-$(OIL_VERSION).tar.gz
 SCHROED_VERSION=1.0.7
 SCHROED_URL=http://www.diracvideo.org/download/schroedinger/schroedinger-$(SCHROED_VERSION).tar.gz
-ASS_VERSION=0.9.5
+ASS_VERSION=0.9.6
 ASS_URL=$(SF)/libass/libass-$(ASS_VERSION).tar.bz2
 GSM_VERSION=1.0.12
 GSM_URL=http://user.cs.tu-berlin.de/~jutta/gsm/gsm-$(GSM_VERSION).tar.gz