Enable longoptions support for grdlandmask. (#8205)

* Enable longoptions support for grdedit.

* Enable longoptions support for grdlandmask.

src/longopt/grdlandmask_inc.h

@@ -25,30 +25,18 @@ static struct GMT_KEYWORD_DICTIONARY module_kw[] = {
  short_directives, long_directives,
  short_modifiers, long_modifiers,
  transproc_mask */
- { 0, 'A', "",
- "", "",
- "", "",
- GMT_TP_STANDARD },
- { 0, 'D', "",
- "", "",
+ { 0, 'A', "min_area|area|area_thresh",
  "", "",
+ "a,l,p,r", "antarctica,regular_lakes,min_polygon,river_lakes",
  GMT_TP_STANDARD },
- { 0, 'E', "",
- "", "",
- "", "",
- GMT_TP_STANDARD },
- { 0, 'G', "",
- "", "",
- "", "",
- GMT_TP_STANDARD },
- { 0, 'I', "",
- "", "",
- "", "",
- GMT_TP_STANDARD },
- { 0, 'N', "",
- "", "",
- "", "",
+ { 0, 'D', "resolution",
+ "f,h,i,l,c,a", "full,high,intermediate,low,crude,auto",
+ "f", "lower",
  GMT_TP_STANDARD },
+ { 0, 'E', "bordervalues|border", "", "", "", "", GMT_TP_STANDARD },
+ GMT_G_OUTGRID_KW,
+ GMT_I_INCREMENT_KW,
+ { 0, 'N', "maskvalues", "", "", "", "", GMT_TP_STANDARD },
  { 0, '\0', "", "", "", "", "", 0 } /* End of list marked with empty option and strings */
 };
 #endif /* !GRDLANDMASK_INC_H */