(proxy) test bug: .../Proxy/ClassRestrictions.java import has become ambiguous

The regression test

test/java/lang/reflect/Proxy/ClassRestrictions.java

has been failing to compile since the addition of the class java.net.Proxy (see 4696512) into Tiger (8/17 JSN integration).

The test just uses following type-import-on-demand declarations:

import java.lang.reflect.*;
import java.net.*;

and expects to be able to refer to the type java.lang.reflect.Proxy by its simple name. With types named Proxy in both java.lang.reflect and java.net, such a reference is ambiguous and a compile-time error occurs.