Modified const and extern to always use blocks

tests/programs/const.q

@@ -1,12 +1,14 @@
-num const {
-	one 1
-	two 2
-	three 3
-}
-
 main() {
 	assert num.one == 1
 	assert num.two == 2
 	assert num.three == 3
 	assert num.one + num.two == num.three
+}
+
+const {
+	num {
+		one 1
+		two 2
+		three 3
+	}
 }