build: give explicit error when unable to setuid on install.

Added build error message when 'make install' is run as non-root
and the --disable-setuid-install configuration option has not been
used.

Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Tested-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
1 file changed