Factor out toolset definitions in a separate gypi file

preparser/preparser.gyp

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 11 matching lines @@
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 {
   'variables': {
     'v8_code': 1,
   },
-  'includes': ['../build/common.gypi'],
+  'includes': ['../build/toolchain.gypi', '../build/features.gypi'],
   'targets': [
     {
       'target_name': 'preparser',
       'type': 'executable',
       'conditions': [
         # preparser can't link against a shared library, so link against
         # the underlying static targets.
         ['v8_use_snapshot=="true"', {
           'dependencies': ['../tools/gyp/v8.gyp:v8_snapshot'],
         }, {
           'dependencies': [
             '../tools/gyp/v8.gyp:v8_nosnapshot.<(v8_target_arch)',
           ],
         }],
       ],
       'include_dirs+': [
         '../src',
       ],
       'sources': [
         'preparser-process.cc',
         '../include/v8-preparser.h',
         '../src/preparser-api.cc',
       ],
     },
   ],
 }