Merge pull request #259 from TChilderhose/opus_1.6.1

Update opus to 1.6.1

Author: markus-perl

build-ffmpeg

@@ -840,7 +840,7 @@ if build "lame" "3.100"; then
 fi
 CONFIGURE_OPTIONS+=("--enable-libmp3lame")
 
-if build "opus" "1.6"; then
+if build "opus" "1.6.1"; then
   download "https://downloads.xiph.org/releases/opus/opus-$CURRENT_PACKAGE_VERSION.tar.gz"
   execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
   execute make -j $MJOBS