CPU_ARCH patches for thunderbird and enigmail

[Alex Dupre]

I prepared patches for thunderbird and seamonkey regarding the following
issue:
http://lists.freebsd.org/pipermail/freebsd-gecko/2009-July/000189.html

They are available here:
http://www.alexdupre.com/thunderbird.diff
http://www.alexdupre.com/seamonkey.diff

I'm going to commit them soon if there are no objections. The same thing
should be done for all mozilla ports.

-- 
Alex Dupre