getopt: synchronize from glibc

getopt: synchronize from glibc

Make gnulib closer to glibc, to make tracking it easier to track
extent of pending patches against glibc.

* lib/getopt.c (_getopt_initialize, _getopt_internal_r): Swap
parameter order.  Adjust all callers.
(_getopt_internal_r, main): Adjust quoting in error messages.
Drop considerations for outdated POSIX 1003.2 error message.
* lib/getopt1.c (_getopt_long_r, _getopt_long_only_r): Adjust
callers.
* lib/getopt_int.h (_getopt_internal_r): Adjust prototype.

Signed-off-by: Eric Blake <ebb9@byu.net>