Update references to tools/telemetry in .gn, .gyp & .isolate files

tools/perf/chrome_telemetry_build/telemetry_chrome_test.isolate

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 {
   # This isolate describes dependencies needed to run Telemetry tests
   # that run in Chromium.
   'includes': [
     '../../../chrome/breakpad.isolate',
     '../../../chrome/chrome.isolate',
-    '../../telemetry/telemetry.isolate',
     'telemetry_binary_manager.isolate',
   ],
+  'conditions': [
+    ['OS=="android" or OS=="linux" or OS=="mac" or OS=="win"', {
+      'variables': {
+        'files': [
+          '../../../third_party/catapult/',
+        ],
+      },
+    }],
+  ]
+
 }