r.unpack: sync flag description to trunk

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@67396 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/r.unpack/r.unpack.py

@@ -30,7 +30,8 @@
 #%end
 #%flag
 #% key: o
-#% description: Override projection check (use location's projection)
+#% label: Override projection check (use current location's projection)
+#% description: Assume that the dataset has same projection as the current location
 #% guisection: Output settings
 #%end