hlssink2: Fix string leak

Need to free allocated string memory on _finalize()
3 jobs for fix-leak in 5 minutes and 14 seconds (queued for 1 second)
Status Name Job ID Coverage
  Preparation
passed manifest #51046

00:00:19

 
  Build
passed build fedora x86_64 #51047

00:02:01

 
  Full Builds
passed build android arm64 api28 #51048

00:02:52