[Swarming] Isolate valgrind runner.

build/all.gyp

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'targets': [
     {
       'target_name': 'All',
       'type': 'none',
       'dependencies': [
@@ skipping 18 matching lines @@
             '../test/intl/intl.gyp:*',
             '../test/message/message.gyp:*',
             '../test/mjsunit/mjsunit.gyp:*',
             '../test/mozilla/mozilla.gyp:*',
             '../test/optimize_for_size.gyp:*',
             '../test/preparser/preparser.gyp:*',
             '../test/simdjs/simdjs.gyp:*',
             '../test/test262/test262.gyp:*',
             '../test/webkit/webkit.gyp:*',
             '../tools/check-static-initializers.gyp:*',
+            '../tools/run-valgrind.gyp:*',
           ],
         }],
       ]
     }
   ]
 }