ios: Allow bot configs to set extra env variables

scripts/slave/recipe_modules/ios/api.py

Index: scripts/slave/recipe_modules/ios/api.py
diff --git a/scripts/slave/recipe_modules/ios/api.py b/scripts/slave/recipe_modules/ios/api.py
index 671f0bb6c85acb39ac946166a3f165ec4946116d..2568900bdf70cc70382726e50acfdc28590c2678 100644
--- a/scripts/slave/recipe_modules/ios/api.py
+++ b/scripts/slave/recipe_modules/ios/api.py
@@ -224,6 +224,9 @@ class iOSApi(recipe_api.RecipeApi):
       'LANDMINES_VERBOSE': '1',
     }
 
+    # Add extra env variables.
+    env.update(self.__config.get('env', {}))

[smut, 2015/05/19 19:52:08]

In read_build_config, please add self.__config['env'] = self.__config.get('env',
{}), changing this to env.update(self.__config['env']). All the other optional
self.__config properties are initialized to empty there.

[hans, 2015/05/19 20:11:45]

Done.

+
     if self.compiler == 'xcodebuild':
       env['GYP_GENERATORS'] = 'xcode'
       env['GYP_GENERATOR_FLAGS'] = 'xcode_project_version=3.2'