ww: finish initialization validation parity

test/wcc/data/callinit_global_reject/case.ww

@@ -1,6 +1,5 @@
-//ww:error "runtime initializer unsupported (alloc/call; rule 7)"
-// The call sibling of alias_infptr_global's alloc reject: a
-// module-scope call initializer has no link-time data either.
+//ww:run-exit 7
+// A module-scope call initializer executes once in the package task.
 package main;
 fn mk() i64 = { return 7; };
 let gc: i64 = mk();