[gfortran,patch] Fix RANDOM_SEED: optional arguments and -fdefault-integer-8

[Thomas Koenig]

:REVIEWMAIL:

Hi FX,

your patch regtests fine on i686-pc-linux-gnu.  OK to commit.  Thanks!

(Strangely, your message didn't make it into my inbox, which is why
I am forced to break thread here.  Maybe my provider's spam filter
is acting up...)

	Thomas