opus: Update to 1.3.1

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/opus/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=opus
-PKG_VERSION:=1.3
+PKG_VERSION:=1.3.1
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://archive.mozilla.org/pub/opus
-PKG_HASH:=4f3d69aefdf2dbaf9825408e452a8a414ffc60494c70633560700398820dc550
+PKG_HASH:=65b58e1e25b2a114157014736a3d9dfeaad8d41be1c8179866f144a2fb44ff9d
 
 PKG_MAINTAINER:=Ted Hess <thess@kitchensync.net>, Ian Leonard <antonlacon@gmail.com>
 PKG_LICENSE:=BSD-3-Clause