Test for #7663 doesn't test anything (?)

[pvdrz]

This is a similar story to #140765. Basically tests/ui/issues/issue-7663.rs doesn't test anything as the glob imports were removed from the file and there's no duplicated import for p on either case.

I think the test should no longer be run-pass and instead it should test that:

• Importing both p items with glob imports fails
• Importing both p items with non-glob imports fails
• Importing one p with a glob import and another p with a non-glob import is ok.

I'll create a PR with a fix if this is correct.

Thanks!