test: prove ordinary import binding modes

test/wcc/data/r957_assert_shadow_xmod/case.ww

@@ -5,6 +5,6 @@ export fn assert(b: bool, msg: str) void = { };
 package main;
 import m;
 export fn main() i32 = {
-	assert(false, "routed to m.assert");
+	m.assert(false, "routed to m.assert");
 	return 42;
 };