Track recent autoconf changes:

	Track recent autoconf changes:
	* m4/Makefile.in: Rebuilt.
	* m4/Makefile.am (m4data_DATA): Updated for deleted files.
	* m4/init.m4 (AM_INIT_AUTOMAKE): Use AC_PROG_INSTALL.
	* m4/mingw.m4: Removed.
	* m4/cygwin.m4: Removed.
	* m4/install.m4: Removed.
	* m4/exeext.m4: Removed.
	* automake.in (scan_one_configure_file): Don't look for
	AM_EXEEXT.
	(check_cygnus): Only mention AC_EXEEXT.
	(obsolete_macros): Mention AM_PROG_INSTALL, AM_EXEEXT,
	AM_CYGWIN32, AM_MINGW32.
	($seen_prog_install): Changed interpretation; changed all users.
	(scan_one_configure_file): Don't look for AM_PROG_INSTALL.
	($scripts_installed): Removed.
	(handle_scripts): Use local $scripts_installed.
	* aclocal.in (obsolete_macros): Added AM_PROG_INSTALL, AM_EXEEXT,
	AM_CYGWIN32, AM_MINGW32.