Log Message:
Improve the ghc bootstrap kit.
   - use a different ghc build that installs less stuff;
   - if using gcc, link statically with libgcc so the bootstrap kit
     can be used on a clang-only system;
   - try to avoid using pkgsrc readline and gmp, and force what's left
     to link statically by denying buildlink for the .so files, so the
     bootstrap kit will still work if those libraries' major numbers
     get bumped.

PKGREVISION -> 1.

This was supposed to get into 2013q4 and should be pulled up, so that
the 2013q4 builds will provide us binary bootstrap kits built on
official build hosts.