[uClibc] some patches/cleanups

[Joakim Tjernlund]

> Remaining issues:
> 1. all the libs except libc can be built fully protected, but there is 
> no location where this can be defined generally (the same CFLAGS is used 
> almost over all of the build system and there are no special defines if we 
> are building libc/libm/utilities and so on,
> glibc uses IN_libc/NOT_IN_libc for ex.)

Can you explain what you mean with "fully protected" and how IN_libc/NOT_IN_libc
should be used?

 Jocke