Initial commit of a patch for the broadcom-sta driver source code so it'll compile on
Linux >=v3.4.0.  I got it from here:

https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/994255

I had to edit it slightly because the original patch references the system architecture name
as a path component, which we don't.

Updated .SlackBuild script to apply the patch.

Signed-off-by: The Doctor <drwho@virtadpt.net>