VM: Add dart_precompiled build target, a standalone VM without the JIT compiler.

tools/gyp/configurations_make.gypi

 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'dart_debug_optimization_level%': '2',
   },
   'target_defaults': {
     'configurations': {
@@ skipping 218 matching lines @@
             'cflags': [
               '-fno-omit-frame-pointer',
             ],
             'defines': [
               'NATIVE_CODE_HAS_FRAME_POINTERS'
             ],
           }],
         ],
         'cflags': [
           '-O3',
+          '-fdata-sections',
+          '-ffunction-sections',
+        ],
+        'ldflags': [
+          '-Wl,--gc-sections',

[rmacnak, 2015/11/17 20:51:18]

Do we need to add flags for Mac too?

[Florian Schneider, 2015/11/18 11:44:09]

Possibly - I don't have a Mac at hand yet to test it locally, so I'll leave this
for a future CL.

         ],
       },
     },
   },
 }