3.1.0

Fix a path problem in `install-ffmpeg_4_4.sh`

Author: cainmagi

install-ffmpeg-4_4.sh

@@ -252,7 +252,8 @@ sudo cp target/x86_64-unknown-linux-gnu/release/rav1e.h $BUILD_PATH/include/
 sudo cp -r target/x86_64-unknown-linux-gnu/release/rav1e $BUILD_PATH/include/
 sudo cp target/x86_64-unknown-linux-gnu/release/rav1e.pc $BUILD_PATH/lib/pkgconfig/
 sudo cp target/x86_64-unknown-linux-gnu/release/librav1e.* $BUILD_PATH/lib/
-sudo ln -s $BUILD_PATH/lib/librav1e.so $BUILD_PATH/lib/librav1e.so.0
+cd $BUILD_PATH/lib || fail
+sudo ln -s librav1e.so librav1e.so.0
 
 # Install dependencies for GPU: ffnvcodec
 msg "Install the newest ffnvcodec."