binutils, gcc-4.2, gcc-4.3, gcc-snapshot builds

[Matthias Klose <doko@cs.tu-berlin.de>]

 - binutils should be buildable with a recent kernel version
 - patches in gcc-4.2 are updated, so please do build this package
 - please build gcc-4.3 (experimental), and gcc-snapshot to get
   test results of these versions. the builds require at least
   256mb ram.