Rename vmservice/client to vmservice/observatory to match package name.

runtime/bin/vmservice/client/tests/ui/retainingPath.dart

Index: runtime/bin/vmservice/client/tests/ui/retainingPath.dart
===================================================================
--- runtime/bin/vmservice/client/tests/ui/retainingPath.dart	(revision 38989)
+++ runtime/bin/vmservice/client/tests/ui/retainingPath.dart	(working copy)
@@ -1,31 +0,0 @@
-/*
-0.
-dart --observe retainingPath.dart
-1.
-isolate 'root'
-2.
-library 'retainingPath.dart'
-3.
-class 'Foo'
-4.
-under 'instances', find 'strongly reachable' list; it should contain 2 elements, one of which should have a field containing "87"
-5.
-instance "87"
-6.
-find 'retaining path'; it should have length 4, and be annotated as follows:
- "87" in var a
- Foo in var b
- Foo at list index 5 of
- _List(10)
-*/
-class Foo {
-  var a;
-  var b;
-  Foo(this.a, this.b);
-}
-
-main() {
-  var list = new List<Foo>(10);
-  list[5] = new Foo(42.toString(), new Foo(87.toString(), 17.toString()));
-  while (true) {}
-}