Installing headers with 0.9.29 spawns gcc errors

[Paul Brook]

> Unfortunately, Rules.mak does the following (only arm shown):
> CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
>...
> Shouldn't we add each of those {gcc,as,ld} options using call_{gcc,as,ld) ?

No. We shouldn't be invoking the compiler in the first place.
We should either use the right compiler (with all the right options), or don't 
use a compiler at all.

Paul