r.rgb: use standardized options (https://trac.osgeo.org/grass/ticket/2409) - (merge https://trac.osgeo.org/grass/changeset/63047 from trunk)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@63048 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/r.rgb/r.rgb.py

@@ -21,6 +21,7 @@
 #%option G_OPT_R_INPUT
 #%end
 #%option G_OPT_R_BASENAME_OUTPUT
+#% label: Name of output basename raster map(s)
 #% description: Default: input
 #% required: no
 #%end