cc/gcc: add option to enable/disable libmudflap

For some scenarii, libmudflap is not very usefull
or can break the build. Make in an optioon that
defaults to 'N' to be on the safe side.

For the core gcc-s, there is absolutely no need
to build libmidflap.

Idea from: Bernhard Pfund <bernhard@chapter7.ch>

cc/gcc: make sjlj config option a tristate

A tristate fits better here than a choice.

cc/gcc: move options around

config: allow unconditional usage of tristates

libc-uclibc: move options

libc/uClibc: fix space damage

libc/uClibc: fix using pre-generated locale data

Some time, someone updated the locale Makefile to use
newer pre-generated locales data, but did not upload
those.

So we just force using the existing, ageing archive,
dating back 20030818. Sigh...

libc/uClibc: do not systematically use pre-generated locale data

It seems that using pre-generated locale data can be more problematic
than usefull in some circumstances.

Offer a config knob to enable/disable use of the pregen locale data.
Also, do not extract pregen locales data ourselves, it's broken.

configure: fix --mandir

--mandir points to the base dir of the man pages, so
we have to append our man section below given dir.
(transplanted from a8a4d5c9773893fa6978e5f9e1445d1e8185c24a)

scripts: add a cross-ldd-like

Add a cross-ldd that mimicks a native ldd.