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

 iconvconfig.c: In function 'write_output':

 iconvconfig.c:973: error: invalid storage class for function 'name_insert'

 --- glibc-2.2.5/iconv/iconvconfig.c.old	2002-01-20 19:20:53.000000000 -0800

 +++ glibc-2.2.5/iconv/iconvconfig.c	2005-03-11 14:30:27.000000000 -0800

 @@ -969,7 +969,12 @@

    char tmpfname[sizeof (GCONV_MODULES_CACHE) + strlen (".XXXXXX")];

    /* Function to insert the names.  */

 -  static void name_insert (const void *nodep, VISIT value, int level)

 +#if __GNUC__ >= 4

 +  auto 

 +#else

 +  static 

 +#endif

 +  void name_insert (const void *nodep, VISIT value, int level)

      {

        struct name *name;

        unsigned int idx;