Add neg test

Author: odersky

tests/neg/implied-for.scala

@@ -0,0 +1,19 @@
+trait T
+class B extends T
+class C extends T
+
+object A {
+  implied b for B
+  implied c for C
+}
+
+object Test extends App {
+  import A._
+  import implied A.{for B}
+
+  val x: B = b // OK
+  println(c) // error: not found
+
+  the[C] // error
+
+}