pg_basebackup has an accidentaly separated help message

Hello.

pg_basebackup.c: got the following message lines:

>    printf(_("  -i, --incremental=OLDMANIFEST\n"));
>    printf(_("                         take incremental backup\n"));

I'd suggest merging these lines as follows (and the attached patch).

> +    printf(_("  -i, --incremental=OLDMANIFEST\n"
> +             "                         take incremental backup\n"));

regards.

-- 
Kyotaro Horiguchi
NTT Open Source Software Center