dialect/sql/schema: sqlite support for uuid type

Summary: Pull Request resolved: https://github.com/facebookincubator/ent/pull/177

Reviewed By: alexsn

Differential Revision: D18615595

fbshipit-source-id: b3167a0aa9260cdf22d88dd7e45c7ebfae1909d5

dialect/sql/schema/sqlite.go

@@ -110,6 +110,8 @@ func (*SQLite) cType(c *Column) (t string) {
 		t = "datetime"
 	case field.TypeJSON:
 		t = "json"
+	case field.TypeUUID:
+		t = "uuid"
 	default:
 		panic("unsupported type " + c.Type.String())
 	}