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.

 CONFIG_SUB_SRC="http://cvs.savannah.gnu.org/viewcvs/*checkout*/config/config/config.sub"

 CONFIG_SUB_DEST="$(CT_TOP_DIR)/tools/config.sub"

 CONFIG_GUESS_SRC="http://cvs.savannah.gnu.org/viewcvs/*checkout*/config/config/config.guess"

 CONFIG_GUESS_DEST="$(CT_TOP_DIR)/tools/config.guess"

 updatetools:

 	@wget "$(CONFIG_SUB_SRC)" -O "$(CONFIG_SUB_DEST)"

 	@wget "$(CONFIG_GUESS_SRC)" -O "$(CONFIG_GUESS_DEST)"

 help::

 	@echo  '  updatetools    - Update the config tools'

 	@echo  ''