fix broken syntax in bash completion
The completion code added in f7d9b56 ("Port fedrepo-req and
fedrepo-req-branch to fedpkg", 2017-12-07) missed ';;' separating the
request-branch and request-repo patterns. Attempting to source the
bash completion script results in an error:
$ . /usr/share/bash-completion/completions/fedpkg.bash
-bash: /usr/share/bash-completion/completions/fedpkg.bash: line 196: syntax error near unexpected token `)'
-bash: /usr/share/bash-completion/completions/fedpkg.bash: line 196: ` request-repo)'
Signed-off-by: Todd Zullinger <tmz@pobox.com>