refactor the gyp file to gypi file.

Basically, the gypi file is a copy of gyp file, but has some difference on the
path of the dependencies.
Review URL: http://webrtc-codereview.appspot.com/137020

git-svn-id: http://webrtc.googlecode.com/svn/trunk@581 4adac7df-926f-26a2-2b94-8c16560cd09d

src/common_audio/common_audio.gyp

@@ -0,0 +1,16 @@
+# Copyright (c) 2011 The WebRTC 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 in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+{
+  'includes': [
+    '../common_settings.gypi', # Common settings
+    'signal_processing_library/main/source/spl.gypi',
+    'resampler/main/source/resampler.gypi',
+    'vad/main/source/vad.gypi',
+  ],
+}

src/common_audio/resampler/main/source/resampler.gypi

@@ -7,15 +7,12 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 {
-  'includes': [
-    '../../../../common_settings.gypi', # Common settings
-  ],
   'targets': [
     {
       'target_name': 'resampler',
       'type': '<(library)',
       'dependencies': [
-        '../../../signal_processing_library/main/source/spl.gyp:spl',
+        'spl',
       ],
       'include_dirs': [
         '../interface',

src/common_audio/signal_processing_library/main/source/spl.gypi

@@ -7,9 +7,6 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 {
-  'includes': [
-    '../../../../common_settings.gypi', # Common settings
-  ],
   'targets': [
     {
       'target_name': 'spl',

src/common_audio/vad/main/source/vad.gypi

@@ -7,15 +7,12 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 {
-  'includes': [
-    '../../../../common_settings.gypi', # Common settings
-  ],
   'targets': [
     {
       'target_name': 'vad',
       'type': '<(library)',
       'dependencies': [
-        '../../../signal_processing_library/main/source/spl.gyp:spl',
+        'spl',
       ],
       'include_dirs': [
         '../interface',