Fix opencore URL

Author: useafterfree

build-ffmpeg

@@ -723,7 +723,7 @@ if command_exists "python3"; then
 fi
 
 if build "opencore" "0.1.6"; then
-  download "https://netactuate.dl.sourceforge.net/project/opencore-amr/opencore-amr/opencore-amr-0.1.6.tar.gz" "opencore-amr-0.1.6.tar.gz"
+  download "https://sourceforge.net/projects/opencore-amr/files/opencore-amr/opencore-amr-0.1.5.tar.gz/download" "opencore-amr-0.1.6.tar.gz"
   execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static
   execute make -j $MJOBS
   execute make install