package/opus: bump version to 1.3.1

Fixes a number of post-1.3 fixes.  For details, see the announcement:

http://lists.xiph.org/pipermail/opus/2019-April/004318.html

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/opus/opus.hash

@@ -1,5 +1,5 @@
 # From http://downloads.xiph.org/releases/opus/SHA256SUMS.txt
-sha256 4f3d69aefdf2dbaf9825408e452a8a414ffc60494c70633560700398820dc550  opus-1.3.tar.gz
+sha256 65b58e1e25b2a114157014736a3d9dfeaad8d41be1c8179866f144a2fb44ff9d  opus-1.3.1.tar.gz
 
 # Hash for license file
 sha256 8338ce8d922bb4416ce3dd1e5680173332435e3f0755007ac7801ccd674fe682  COPYING

package/opus/opus.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-OPUS_VERSION = 1.3
+OPUS_VERSION = 1.3.1
 OPUS_SITE = https://downloads.xiph.org/releases/opus
 OPUS_LICENSE = BSD-3-Clause
 OPUS_LICENSE_FILES = COPYING