Try to fix mac build

Author: lalinsky

build-macos.sh

@@ -9,7 +9,7 @@ source common.sh
 
 if [ ! -e $FFMPEG_TARBALL ]
 then
-	curl -LO $FFMPEG_TARBALL_URL
+	curl -s -L -O $FFMPEG_TARBALL_URL
 fi
 
 : ${TARGET?}
@@ -33,7 +33,7 @@ BUILD_DIR=$BASE_DIR/$(mktemp -d build.XXXXXXXX)
 trap 'rm -rf $BUILD_DIR' EXIT
 
 cd $BUILD_DIR
-gzip -d $BASE_DIR/$FFMPEG_TARBALL | tar --strip-components=1 -xf -
+tar --strip-components=1 -xf $BASE_DIR/$FFMPEG_TARBALL
 
 FFMPEG_CONFIGURE_FLAGS+=(
     --cc=/usr/bin/clang