Makefile.am: Properly link examples with libvlc

This fixes the build with gcc 10
2 jobs for !8 with fix_linking in 50 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Test
passed #479140
amd64 docker
continuous_build_3.0

00:00:47

passed #479139
amd64 docker
continuous_build_4.0

00:00:50