package/libass: bump version to 0.13.6

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libass/libass.hash

@@ -1,2 +1,2 @@
 # Locally computed
-sha256 d84a2fc89011b99d87fc47af91906622707c165d1860e9f774825ebbbc9c9fb6  libass-0.13.4.tar.xz
+sha256 f8a874d104e3e72e2cc057e5a1710c650b10367486845a26e5ff28ed7a912c2d  libass-0.13.6.tar.xz

package/libass/libass.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBASS_VERSION = 0.13.4
+LIBASS_VERSION = 0.13.6
 LIBASS_SOURCE = libass-$(LIBASS_VERSION).tar.xz
 # Do not use the github helper here, the generated tarball is *NOT*
 # the same as the one uploaded by upstream for the release.