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.

 --- glibc-2.2.5/stdio-common/sprintf.c.old	Wed May 28 08:59:11 2003

 +++ glibc-2.2.5/stdio-common/sprintf.c	Wed May 28 08:59:45 2003

 @@ -27,9 +27,7 @@

  /* Write formatted output into S, according to the format string FORMAT.  */

  /* VARARGS2 */

  int

 -sprintf (s, format)

 -     char *s;

 -     const char *format;

 +sprintf (char *s, const char *format, ...)

  {

    va_list arg;

    int done;