Port to OpenBSD from Thomas Nordin.  Please merge with 4.08 (you'll also
need the new config.guess and config.sub from the previous commit).

Script that automates building GHC from .hc files.

?? Shall I edit the corresponding section in building.sgml to advise the use
?? of this script (thus replacing the outdated description of the manual
?? steps - which is wrong anyway).