Ensure to rebuild generated .h files when config.status has changed.

* modules/arpa_inet (Makefile.am): Add dependency from .h file to
config.status.
* modules/ctype (Makefile.am): Likewise.
* modules/dirent (Makefile.am): Likewise.
* modules/errno (Makefile.am): Likewise.
* modules/fcntl-h (Makefile.am): Likewise.
* modules/float (Makefile.am): Likewise.
* modules/getopt-posix (Makefile.am): Likewise.
* modules/glob (Makefile.am): Likewise.
* modules/iconv-h (Makefile.am): Likewise.
* modules/inttypes (Makefile.am): Likewise.
* modules/langinfo (Makefile.am): Likewise.
* modules/locale (Makefile.am): Likewise.
* modules/math (Makefile.am): Likewise.
* modules/netdb (Makefile.am): Likewise.
* modules/netinet_in (Makefile.am): Likewise.
* modules/poll-h (Makefile.am): Likewise.
* modules/pthread (Makefile.am): Likewise.
* modules/pty (Makefile.am): Likewise.
* modules/sched (Makefile.am): Likewise.
* modules/search (Makefile.am): Likewise.
* modules/selinux-h (Makefile.am): Likewise.
* modules/signal (Makefile.am): Likewise.
* modules/spawn (Makefile.am): Likewise.
* modules/stdarg (Makefile.am): Likewise.
* modules/stdbool (Makefile.am): Likewise.
* modules/stddef (Makefile.am): Likewise.
* modules/stdint (Makefile.am): Likewise.
* modules/stdio (Makefile.am): Likewise.
* modules/stdlib (Makefile.am): Likewise.
* modules/string (Makefile.am): Likewise.
* modules/strings (Makefile.am): Likewise.
* modules/sys_file (Makefile.am): Likewise.
* modules/sys_ioctl (Makefile.am): Likewise.
* modules/sys_select (Makefile.am): Likewise.
* modules/sys_socket (Makefile.am): Likewise.
* modules/sys_stat (Makefile.am): Likewise.
* modules/sys_time (Makefile.am): Likewise.
* modules/sys_times (Makefile.am): Likewise.
* modules/sys_utsname (Makefile.am): Likewise.
* modules/sys_wait (Makefile.am): Likewise.
* modules/sysexits (Makefile.am): Likewise.
* modules/termios (Makefile.am): Likewise.
* modules/time (Makefile.am): Likewise.
* modules/unistd (Makefile.am): Likewise.
* modules/wchar (Makefile.am): Likewise.
* modules/wctype-h (Makefile.am): Likewise.
Reported by Karl Berry, Eric Blake, and Ralf Wildenhues.