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.

 --- gcc-3.4.4/gcc/config/rs6000/linux-unwind.h.org	2005-06-23 17:50:34.000000000 -0600

 +++ gcc-3.4.4/gcc/config/rs6000/linux-unwind.h	2005-06-23 17:52:02.000000000 -0600

 @@ -32,6 +32,7 @@

     these structs elsewhere;  Many fields are missing, particularly

     from the end of the structures.  */

 +#ifndef inhibit_libc

  struct gcc_vregs

  {

    __attribute__ ((vector_size (16))) int vr[32];

 @@ -320,3 +321,4 @@

  									\

      goto SUCCESS;							\

    } while (0)

 +#endif