Add -[BreakpadController resetConfiguration] for iOS.

Add a resetConfiguration method to BreakpadController for iOS. The new method
resets the controller configuration to its initial value, which is the
infoDictionary of the bundle of the application.

Patch by KiYun Roe <kiyun@chromium.org>

BUG=554

Review URL: https://breakpad.appspot.com/904002/

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1256 4c0a9323-5329-0410-9bdc-e9ce6186880e