* configure.in: Rewrite to use autoconf.

	* configure.in: Rewrite to use autoconf.
	* aclocal.m4: New file.
	* configure: New file, built by autoconf.
	* acconfig.h: New file.
	* config.h.in: New file, built by autoheader.
	* Makefile.in: Various changes for new configure script.  Also:
	(PROGS): Remove $(SYSINFO_PROG).
	(ALL_CFLAGS): Remove $(TDEFINES).
	(version.o): Use $(ALL_CFLAGS).
	(cplus-dem.o, dlltool.o, nlmconv.o): Likewise.
	(sysdump.o): Depend upon bucomm.h and config.h.
	(srconv.o, arsup.o, strings.o): Depend upon config.h.
	(filemode.o): Don't depend upon ../bfd/sysdep.h.
	(bucomm.o): Depend upon config.h, not ../bfd/sysdep.h.
	(size.o, objdump.o, nm.o, ar.o, objcopy.o): Likewise.
	(nlmheader.o, nlmconv.o): Likewise.
	(distclean): Don't remove sysdep.h.
	* bucomm.h: Include "ansidecl.h", <stdio.h>, and "config.h".
  	Include "fopen-same.h" or "fopen-bin.h", based on
 	USE_BINARY_FOPEN.  Include <errno.h>, and declare errno if it is
 	not a macro.  Include <unistd.h>, <string.h>, <strings.h>,
 	<stdlib.h>, and <fcntl.h> if they are present.  Declare strchr,
 	strrchr, and strstr if no string header file exists.  Include
	<sys/file.h> if it exists and <fcntl.h> does not.  Define
	O_RDONLY and O_RDWR if necessary.
	* ar.c:  Don't include "sysdep.h".  Do include <sys/types.h> and
	<sys/stat.h>.  Use HAVE_GOOD_UTIME_H rather than POSIX_UTIME.  Use
	HAVE_UTIMES rather than !USE_UTIME.  Don't include <errno.h>, and
	don't declare errno.
	* arsup.c: Don't include <sysdep.h>.
	* bucomm.c: Don't include "sysdep.h".  Include <stdio.h>,
	<sys/types.h>, and <sys/stat.h>.  Include <time.h> if it defines
	time_t.  Define time_t if necessary.
	* coffdump.c: Don't include "sysdep.h".
	* coffgrok.c, filemode.c, nlmconv.c, size.c: Likewise.
	* srconv.c, strings.c: Likewise.
	* nm.c: Don't include "sysdep.h".  Don't try to define HAVE_SBRK.
	* objcopy.c: Don't include "sysdep.h".  Include <sys/types.h> and
	<sys/stat.h>.
	(simple_copy): Use creat rather than assuming that O_CREAT is
	defined.
	* objdump.c: Don't include "sysdep.h".  Use
	NEED_DECLARATION_PRINTF rather than !FPRINTF_ALREADY_DECLARED.
	* sysdump.c: Include "bfd.h" and "bucomm.h".  Don't include
	"sysdep.h" or <stdlib.h>.
	(dump_symbol_info): Rename from symbol_info.  Change all callers.