HEADS UP: port i386 and amd64 switched to GCC 4.5.3

[matthew green <mrg%eterna.com.au@localhost>]

hi folks.


i've switched i386 and amd64 to use GCC 4.5.3 by default.  there
shouldn't be any major issues, however update builds won't work.
i recommend removing both destdir and objdir before rebuilding.

if you need to revert this change, use build.sh -V HAVE_GCC=4.

let me know if there are problems!  thanks.


.mrg.