Fix gyp files so that gyp_to_Android.mk succeeds

gyp/piex.gyp

 # Copyright 2016 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 {
 'targets': [{
   'target_name': 'piex-selector',
   'type': 'none',
   'conditions': [
     [ 'skia_android_framework', {
-        'dependencies': [ 'android_deps.gyp:piex' ],
-        'export_dependent_settings': [ 'android_deps.gyp:piex' ],
+        'dependencies': [ 'android_deps.gyp:libpiex' ],
+        'export_dependent_settings': [ 'android_deps.gyp:libpiex' ],
       }, {
-        'dependencies': [ 'piex' ],
-        'export_dependent_settings': [ 'piex' ],
+        'dependencies': [ 'piex.gyp:piex' ],
+        'export_dependent_settings': [ 'piex.gyp:piex' ],
     }]
   ]
 },{
   'target_name': 'piex',
   'type': 'static_library',
   'sources': [
     '../third_party/externals/piex/src/piex.cc',
     '../third_party/externals/piex/src/tiff_parser.cc',
   ],
   'variables': {
@@ skipping 59 matching lines @@
   'sources': [
     '../third_party/externals/piex/src/tiff_directory/tiff_directory.cc',
   ],
   'variables': {
     'headers': ['../third_party/externals/piex/src/tiff_directory/tiff_directory.h'],
   },
   'include_dirs': ['../third_party/externals/piex'],
   'dependencies': ['binary_parse'],
 }],
 }