[ios, osx] Fixed project upgrade warnings

Fixed project upgrade warnings in projects managed by gyp.

mbgl.gypi

@@ -22,6 +22,8 @@
           'GCC_WARN_PEDANTIC': 'YES',
           'GCC_WARN_UNINITIALIZED_AUTOS': 'YES_AGGRESSIVE',
           'MACOSX_DEPLOYMENT_TARGET': '10.10',
+          'ALWAYS_SEARCH_USER_PATHS': 'NO',
+          'COMBINE_HIDPI_IMAGES': 'YES',
         },
       }, {
         'cflags_cc': [
@@ -120,6 +122,14 @@
       },
     },
   },
+  'configurations': {
+    'Debug': {
+      'xcode_settings': {
+        'ENABLE_TESTABILITY': 'YES',
+        'ONLY_ACTIVE_ARCH': 'YES',
+      },
+    },
+  },
   'targets': [
     {
       'target_name': 'core',

platform/ios/platform.gyp

@@ -54,6 +54,7 @@
         'CLANG_ENABLE_OBJC_ARC': 'YES',
         'CLANG_ENABLE_MODULES': 'YES',
         'CODE_SIGN_IDENTITY': 'iPhone Developer',
+        'PRODUCT_BUNDLE_IDENTIFIER': 'com.mapbox.MapboxGLUnitTest',
       },
 
       'copies': [{

test/src/app-info.plist

@@ -9,7 +9,7 @@
 	<key>CFBundleExecutable</key>
 	<string>${EXECUTABLE_NAME}</string>
 	<key>CFBundleIdentifier</key>
-	<string>com.mapbox.MapboxGLUnitTest</string>
+	<string>${PRODUCT_BUNDLE_IDENTIFIER}</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>