get iOS building again

gyp/most.gyp

 # Build ALMOST everything provided by Skia; this should be the default target.
 #
 # This omits the following targets that many developers won't want to build:
 # - debugger: this requires QT to build
 #
 {
   'variables': {
     'skia_skip_gui%': 0,
   },
   'targets': [
@@ skipping 11 matching lines @@
         'tools.gyp:tools',
         'pathops_unittest.gyp:*',
         'skpskgr_test.gyp:*',
 #       'pdfviewer.gyp:pdfviewer',
         'dm.gyp:dm',
       ],
       'conditions': [
         ['skia_os == "android"', {
           'dependencies': [ 'android_system.gyp:SampleApp_APK' ],
         }],
+        ['skia_os == "ios"', {
+          'dependencies!': [ 'SampleApp.gyp:SampleApp' ],
+        }],
         [ 'skia_skip_gui',
           {
             'dependencies!': [
               'SampleApp.gyp:SampleApp',
               'skpskgr_test.gyp:*',
             ]
           }
         ]
       ],
     },
   ],
 }