gdb/doc/

    gdb/doc/
        * gdb.texinfo (Standard Target Features): Document C6x features.
	(TIC6x Features): New node.

        gdb/
        * features/Makefile (WHICH): Add tic6x-c64xp tic6x-c64x tic6x-c62x
        tic6x-c64xp-linux tic6x-c64x-linux and tic6x-c62x-linux.
        * features/tic6x-c6xp.xml, features/tic6x-core.xml: New.
        * features/tic6x-gp.xml, features/tic6x-c62x.xml: New.
        * features/tic6x-c64x.xml, features/tic6x-c64xp.xml: New.
        * features/tic6x-c62x-linux.xml, features/tic6x-c64x-linux.xml: New.
        * features/tic6x-c64xp-linux.xml: New.
	* features/tic6x-c64xp.c, features/tic6x-c64x.c: Generated.
        * features/tic6x-c62x.c, features/tic6x-c64xp-linux.c: Generated.
        * features/tic6x-c64x-linux.c, features/tic6x-c62x-linux.c: Generated.
        * regformats/tic6x-c62x.dat, regformats/tic6x-c64x.dat: Generated.
        * regformats/tic6x-c64xp.dat, regformats/tic6x-c62x-linux.dat: Generated.
	* regformats/tic6x-c64x-linux.dat, regformats/tic6x-c64xp-linux.dat: Generated.

	* config/djgpp/fnchange.lst: Add features/tic6x-*.xml and
	features/tic6x-*.c files.
	Add regformats/tic6x-*.dat files.