Update to the 20100216 snapshot of GCC 4.4.4.
Use current GNU binutils from ports (devel/binutils) instead of the
system tools. The latter are half a decade old and fail to properly
support modern CPUs and their standard features such as SSE or AVX in
the case of AMD64/Intel64 which means that they even break when using
a simple -march=native. This helps address repeated user problems here
and there, also by establishing a consistent base if, for example, the
user has different flavors of as and ld in her path.
On the way, sort CONFIGURE_ARGS.
Feature safe: yes