bionic: Define faccessat if missing

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Whitespace fix

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
travis: Try to workaround current failure

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>