Huge fixes to glibc build, so that we can build at least (and at last):
- use ports addon even when installing headers,
- use optimisation (-O) when installing headers, to avoid unnecessary warnings (thanks Robert P. J. DAY for pointing this out!),
- lowest kernel version to use is only X.Y.Z, not X.Y.Z.T,
- a bit of preparations for NPTL (RSN I hope),
- fix fixing the linker scripts (changing the backup file is kind of useless and stupid);

Shut uClibc finish step: there really is nothing to do;

Add a patch for glibc-2.3.6 weak aliases handling on some archs (ARM and ALPHA at least);

Did not catch the make errors: fixed the pattern matching in scripts/functions;

Introduce a new log level, ALL:
- send components' build messages there,
- DEBUG log level is destined only for crosstool-NG debug messages,
- migrate sub-actions to use appropriate log levels;

Update the armeb-unknown-linux-gnu sample:
- it builds!
- uses gcc-4.0.4 and glibc-2.3.6,
- updated to latest config options set.

 See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10331

 and http://gcc.gnu.org/ml/gcc-patches/2003-06/msg00423.html

 --- gcc-3.3/gcc/config/sh/t-linux.old	Wed Jun  4 13:01:39 2003

 +++ gcc-3.3/gcc/config/sh/t-linux	Wed Jun  4 13:02:12 2003

 @@ -1,3 +1,6 @@

 +# Don't run fixproto

 +STMP_FIXPROTO =

 +

  TARGET_LIBGCC2_CFLAGS = -fpic

  LIB1ASMFUNCS_CACHE = _ic_invalidate