Adjust to recent changes to gnulib bootstrap.

* .cvsignore, build-aux/.cvsignore, doc/.cvsignore, etc/.cvsignore:
* examples/calc++/.cvsignore, lib/.cvsignore, m4/.cvsignore:
* po/.cvsignore, runtime-po/.cvsignore, src/.cvsignore:
* tests/.cvsignore: Remove; I don't use CVS to maintain Bison
anymore and don't know of anybody else who does.  If someone needs
these files, they can resurrect them.
* .gitignore, build-aux/.gitignore, doc/.gitignore, lib/.gitignore:
* m4/.gitignore, po/.gitignore, runtime-po/.gitignore:
Omit leading '/', since bootstrap omits it.
Adjust file names to match current contents better.
* bootstrap: Sync from gnulib: this contains the new gnulib_mk_hook
installed just for us.
* bootstrap.conf (excluded_files): Don't exclude codeset.m4,
glibc21.m4, inttypes_h.m4, size_max.m4, xsize.m4, as they are now
needed somehow.  Don't have time to look into why.
(gnulib_modules): Change malloc to malloc-gnu.  Do we really assume
the GNU malloc behavior, where malloc (0) != NULL unless we're
out of storage?  If not, we can omit malloc-gnu; but for now I left
it in to be safe.
(vc_ignore): Remove.
(gnulib_mk_hook): New function.
* README-hacking: Renamed from HACKING, since gnulib bootstrap now
uses that convention.

doc/.cvsignore

@@ -1,25 +0,0 @@
-*.info*
-bison.1
-bison.aux
-bison.cp
-bison.cps
-bison.dvi
-bison.fn
-bison.help
-bison.html
-bison.ky
-bison.log
-bison.pdf
-bison.pg
-bison.ps
-bison.toc
-bison.tp
-bison.vr
-cross-options.texi
-gendocs_template
-refcard.dvi
-refcard.log
-refcard.ps
-stamp-vti
-version.texi
-yacc.1

doc/.gitignore

@@ -1,25 +1,27 @@
-/*.info*
-/bison.1
-/bison.aux
-/bison.cp
-/bison.cps
-/bison.dvi
-/bison.fn
-/bison.help
-/bison.html
-/bison.ky
-/bison.log
-/bison.pdf
-/bison.pg
-/bison.ps
-/bison.toc
-/bison.tp
-/bison.vr
-/cross-options.texi
-/gendocs_template
-/refcard.dvi
-/refcard.log
-/refcard.ps
-/stamp-vti
-/version.texi
-/yacc.1
+*.info*
+*~
+.dirstamp
+bison.1
+bison.aux
+bison.cp
+bison.cps
+bison.dvi
+bison.fn
+bison.help
+bison.html
+bison.ky
+bison.log
+bison.pdf
+bison.pg
+bison.ps
+bison.toc
+bison.tp
+bison.vr
+cross-options.texi
+gendocs_template
+refcard.dvi
+refcard.log
+refcard.ps
+stamp-vti
+version.texi
+yacc.1