Zlib Download Link Update

Author: markus-perl

build-ffmpeg

@@ -347,7 +347,7 @@ if build "nasm" "2.15.05"; then
 fi
 
 if build "zlib" "1.2.13"; then
-  download "https://www.zlib.net/zlib-1.2.13.tar.gz"
+  download "https://zlib.net/fossils/zlib-1.2.13.tar.gz"
   execute ./configure --static --prefix="${WORKSPACE}"
   execute make -j $MJOBS
   execute make install