* Top level makefile: Fixed and simplified cross-building. It is now possible to perform cross builds when having only bootstrap compiler executable.
  - Always use fresh native fpcmake executable.
  - Build fresh native fpcmake executable when cross-compiling.
  - Explicitly specify a compiler which is used to bootstrap fpmake and fpcmake. Always use fresh native compiler for that. 
* New bootstrap target for fpcmake to build native fpcmake regardless of CPU/OS settings.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23641 3ad0048d-3df7-0310-abae-a5850022a9f2