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

 In file included from include/asm/current.h:4,

                  from include/linux/wait.h:27,

                  from include/asm/semaphore.h:15,

                  from include/linux/sched.h:19,

                  from arch/ppc64/kernel/asm-offsets.c:18:

 include/asm/paca.h:25: error: array type has incomplete element type

 make[1]: *** [arch/ppc64/kernel/asm-offsets.s] Error 1

 when building with gcc-4.0

 --- linux-2.6.11.3/include/asm-ppc64/paca.h.old	Fri Mar 18 13:23:40 2005

 +++ linux-2.6.11.3/include/asm-ppc64/paca.h	Fri Mar 18 13:24:04 2005

 @@ -22,7 +22,6 @@

  #include	<asm/iSeries/ItLpRegSave.h>

  #include	<asm/mmu.h>

 -extern struct paca_struct paca[];

  register struct paca_struct *local_paca asm("r13");

  #define get_paca()	local_paca

 @@ -114,5 +113,7 @@

  	struct ItLpRegSave reg_save;

  #endif

  };

 +

 +extern struct paca_struct paca[];

  #endif /* _PPC64_PACA_H */