Patch: Replace 'hconfig' with 'bconfig' everywhere.

[Nathanael Nerode <neroden at twcny dot rr dot com>]

This finishes (hopefully) the nomenclature confusion by replacing all
references to hconfig with references to bconfig.  Done by pure 
search-and-replace.

Oh yeah; this is for b-i-b.

I'd appreciate this getting approved quickly given how many files it 
touches.

Tested on i686-pc-linux-gnu.  Just fine, not that there's any surprise there.

(gcc)
	* Makefile.in configure configure.in dummy-conditions.c fix-header.c
	gcov-iov.c gen-protos.c genattr.c genattrtab.c genautomata.c
	gencheck.c gencodes.c genconditions.c genconfig.c genconstants.c
	genemit.c genextract.c genflags.c gengenrtl.c gengtype-lex.l
	gengtype-yacc.y gengtype.c genopinit.c genoutput.c genpeep.c
	genpreds.c genrecog.c gensupport.c mkconfig.sh read-rtl.c
	scan-decls.c scan.c config/sh/sh.h: Replace hconfig.h with bconfig.h.
	* Makefile.in: Replace HCONFIG_H with BCONFIG_H.
(gcc/doc)
	* configfiles.texi, install-old.texi: Replace hconfig.h with bconfig.h.
(gcc/f)
	* Make-lang.in, ansify.c, intdoc.c, proj.h: Replace hconfig.h with
	bconfig.h.
	* fini.c, proj.h: Replace USE_HCONFIG with USE_BCONFIG

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