* src/gpg-error.m4: Bump version date.
(min_gpg_error_version): Require >= 1.33, if not specified.
(gpg_error_config_args): Remove bogus uses.
* src/gpgrt.m4: Bump version date.
(libgpgrt-prefix): Add support of --with-libgpgrt-prefix option.
(gpgrt-config): Search/call gpgrt-config instead of gpg-error-config.
(min_gpgrt_version): Require >= 1.33, if not specified.
(gpgrt_config_args): Remove bogus uses.