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-3.4.1/libstdc++-v3/libmath/Makefile.am~	2003-08-27 22:29:42.000000000 +0100

 +++ gcc-3.4.1/libstdc++-v3/libmath/Makefile.am	2004-07-22 16:41:45.152130128 +0100

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

  libmath_la_SOURCES = stubs.c

 -AM_CPPFLAGS = $(CANADIAN_INCLUDES)

 +AM_CPPFLAGS = $(CANADIAN_INCLUDES) -I$(toplevel_srcdir)/include

  # Only compiling "C" sources in this directory.

  LIBTOOL = @LIBTOOL@ --tag CC

 --- gcc-3.4.1/libstdc++-v3/fragment.am.old	2004-07-22 18:24:58.024083656 +0100

 +++ gcc-3.4.1/libstdc++-v3/fragment.am	2004-07-22 18:24:59.019932264 +0100

 @@ -18,7 +18,7 @@

  	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once

  # -I/-D flags to pass when compiling.

 -AM_CPPFLAGS = $(GLIBCXX_INCLUDES)

 +AM_CPPFLAGS = $(GLIBCXX_INCLUDES) -I$(toplevel_srcdir)/include