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.

 --- glibc-2.2.5/configure.old	2003-05-30 21:51:13.000000000 -0700

 +++ glibc-2.2.5/configure	2003-05-30 21:51:23.000000000 -0700

 @@ -1738,7 +1738,7 @@

    ac_cv_prog_cc_works=yes

    # If we can't run a trivial program, we are probably using a cross compiler.

    if (./conftest; exit) 2>/dev/null; then

 -    ac_cv_prog_cc_cross=no

 +    ac_cv_prog_cc_cross=yes

    else

      ac_cv_prog_cc_cross=yes

    fi