Debug facilities:
- add a framework to easily add new ones
- add gdb as a first debug facility
- add patches for gdb
After the kernel checked its installed headers, clean up the mess of .checked.* files.
Reorder scripts/crosstool.sh:
- dump the configuration early
- renice early
- get info about build system early, when setting up the environment
- when in cross or native, the host tools are those of the build system, and only in this case
- elapsed time calculations moved to scripts/functions
Remove handling of the color: it's gone once and for all.
Update tools/addToolVersion.sh:
- handle debug facilities
- commonalise some code
- remove dead tools (cygwin, tcc)
Point to my address for bug reports.

 Fixes drivers/char/char.o(.text+0x178a4): In function `$a':

 : undefined reference to `get_user'

 Part of ftp://ftp.arm.linux.org.uk/pub/armlinux/source/kernel-patches/v2.4/patch-2.4.26-vrs1.bz2

 diff -urN linux-2.4.26/drivers/char/wdt977.c linux-2.4.26-vrs1/drivers/char/wdt977.c

 --- linux-2.4.26/drivers/char/wdt977.c	2002-11-28 23:53:12.000000000 +0000

 +++ linux-2.4.26-vrs1/drivers/char/wdt977.c	2004-01-14 21:32:25.000000000 +0000

 @@ -27,6 +27,7 @@

  #include <asm/io.h>

  #include <asm/system.h>

  #include <asm/mach-types.h>

 +#include <asm/uaccess.h>

  #define WATCHDOG_MINOR	130