libgis: Added G_open/close_option_file

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@60515 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/defs/gis.h

@@ -495,7 +495,9 @@ char *G_recreate_command(void);
 void G_add_keyword(const char *);
 void G_set_keywords(const char *);
 int G_get_overwrite();
-char* G_option_to_separator(const struct Option *);
+char *G_option_to_separator(const struct Option *);
+FILE *G_open_option_file(const struct Option *);
+void G_close_option_file(FILE *);
 
 /* paths.c */
 int G_mkdir(const char *);