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.

 Fixes glibc 'make tests' failure running isomac

 make[2]: *** [/home3/dank/wk/ixos/dap_interim/linux/3rdParty/crosstool/crosstool-0.15/build/sh4-unknown-linux-gnu/gcc-ss-3_3-20030714-glibc-2.2.5/build-glibc/stdlib/isomac.out] Error 2

 isomac.out contains:

 ...

 setjmp.h

 #define JB_SIZE (4 * 15)

 See http://sources.redhat.com/ml/libc-hacker/2002-11/msg00009.html

 and http://www.schweikhardt.net/isomac.c.html

 ===================================================================

 RCS file: /cvs/glibc/libc/sysdeps/sh/bits/setjmp.h,v

 retrieving revision 1.4

 retrieving revision 1.5

 diff -u -r1.4 -r1.5

 --- libc/sysdeps/sh/bits/setjmp.h	2001/07/06 04:56:03	1.4

 +++ libc/sysdeps/sh/bits/setjmp.h	2002/11/06 00:08:30	1.5

 @@ -42,7 +42,9 @@

    } __jmp_buf[1];

  #endif

 +#if defined __USE_MISC || defined _ASM

  #define JB_SIZE		(4 * 15)

 +#endif

  /* Test if longjmp to JMPBUF would unwind the frame

     containing a local variable at ADDRESS.  */