server: improve failure log message for wl_global_create()

The gratuitous %m jammed onto the end of the string prints errno
concatenated with the word "version".

I've removed the %m, and printed some additional information about the
failure.

Also, reversed the order of the expressions in the conditional to
make it match the english in the log message.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>