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

 nss_dns/dns-host.c: In function `_nss_dns_gethostbyaddr_r':

 nss_dns/dns-host.c:268: error: label at end of compound statement

 make[2]: *** [/home/dank/wk/crosstool-0.28-rc4h/build/i686-unknown-linux-gnu/gcc-3.4.0-20040406-glibc-2.1.3/build-glibc/resolv/dns-host.os] Error 1

 make[2]: Leaving directory `/home/dank/wk/crosstool-0.28-rc4h/build/i686-unknown-linux-gnu/gcc-3.4.0-20040406-glibc-2.1.3/glibc-2.1.3/resolv'

 make[1]: *** [resolv/others] Error 2

 when building with gcc-3.4.0

 --- glibc-2.1.3/resolv/nss_dns/dns-host.c.old	Sun Apr 11 20:32:47 2004

 +++ glibc-2.1.3/resolv/nss_dns/dns-host.c	Sun Apr 11 20:33:07 2004

 @@ -264,7 +264,7 @@

        strcpy (qp, "ip6.int");

        break;

      default:

 -      /* Cannot happen.  */

 +      ; /* Cannot happen.  */

      }

    host_buffer = (querybuf *) malloc (sizeof (*host_buffer));