gdb/

gdb/
	* configure.ac: Check for expat.
	* acinclude.m4: Include AC_LIB_HAVE_LINKFLAGS dependencies.
	* Makefile.in (LIBEXPAT): New.
	(CLIBS): Include $(LIBEXPAT).
	* README: Mention expat.
	* configure, config.in: Regenerated.
gdb/doc/
	* gdb.texinfo (Installing GDB): Update menu.  Move text to...
	(Running Configure): ...here.
	(Requirements): New node.  Mention expat.