bad error recovery when current package name included in import

[zygoloid]

package Foo library "a";
class X {}

package Foo library "b";
import Foo library "a";
var a: X = {};

produces an error that the package name must be omitted when importing from the current package, which is good. But then the import appears to be ignored entirely, resulting in an additional error that X is unknown.

I think we should just ignore the package name in the import in that case.