cli: Install bash autocomplete during 'make install'
FYI, this change is causing breakage in my current compile script.
install: cannot create regular file '/usr/share/bash-completion/completions/x264': Permission denied.
The script doesn't have super user permissions. I wouldn't want for it to touch anything in the system other than the designated folders with
--bindir. You should consider giving the opportunity to make a CLI install without touching global system files.