move ports into its own gyp file


git-svn-id: http://skia.googlecode.com/svn/trunk@2874 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/tools.gyp b/gyp/tools.gyp
index e0c04b4..3bc2814 100644
--- a/gyp/tools.gyp
+++ b/gyp/tools.gyp
@@ -30,6 +30,7 @@
       'dependencies': [
         'core.gyp:core',
         'images.gyp:images',
+        'ports.gyp:ports',
         'utils.gyp:utils',
       ],
     },
@@ -42,6 +43,7 @@
       'dependencies': [
         'core.gyp:core',
         'images.gyp:images',
+        'ports.gyp:ports',
         'utils.gyp:utils',
       ],
     },
@@ -54,6 +56,7 @@
       'dependencies': [
         'core.gyp:core',
         'images.gyp:images',
+        'ports.gyp:ports',
         'utils.gyp:utils',
       ],
     },