[aur-general] mpfr-3.0.0 rebuild

Hi, I will be uploading mpfr-3.0.0 soon. This requires a small amount of rebuilds (see below - I have not made a todo list). I will handle all of [core] and [extra]. I will also be pulling a new gcc-4.5 snapshot as the bug we patch out has be properly fixed upstream along with a couple of other useful fixes. [core] gcc/gcc-ada/gcc-fortran/gcc-objc libmpc [extra] genius rasqal seed [community] cross-arm-elf-gcc-base gcc-avr mingw32-gcc mingw32-gcc-base BTW, we really need to standarise cross-compiler naming... Allan