Rebase to latest upstream 0.19.0
    
    Removed libbcc-no-libbpf.so library.
    
    Before:
      libbcc.so           - libbpf is statically compiled in
      libbcc-no-libbpf.so - libbpf is dynamically linked
    
    Now:
      libbcc.so           - libbpf is dynamically linked
    
    Signed-off-by: Jiri Olsa <jolsa@redhat.com>