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.

#!/bin/sh

# This scripts extracts a crosstool-ng configuration from the log file

# of a toolchain build with crosstool-ng.

# Usage: $0 <logfile>

cat "$1" |awk '

BEGIN {

  dump = 0;

}

$0~/Dumping crosstool-NG configuration: done in.+s$/ {

  dump = 0;

}

dump == 1 { $1 = "" }

dump == 1

$0~/Dumping crosstool-NG configuration$/ {

  dump = 1;

}

' |cut -d ' ' -f 2-