* Use static linking for mpfr/gmp instead of the rpath. This avoid the layering

* Use static linking for mpfr/gmp instead of the rpath. This avoid the layering
  violation and makes sure that gcc-cross-sdk will build as well.
* For gcc4.3 we need to look at the gmp/mpfr again as they will be required for
  everything and not just gfortran
* Apply a patch to gcc_4.2.2 but only if we want to build gcc. We want to be able
  to use arm-angstrom-linux-gnueabi-gfortran and the GF="$(GFORTRAN)" would have set
  the fortran to 'gfortran' and we ended up with a build error. Some more experiments
  with GFORTRAN_FOR_TARGET are needed.