BlackBerry project template updates

* Updated .cproject to use workspace_loc to enable copying the template out of the cocos2d-x tree.
* Updated bar-descriptor.xml to be more modern. Tested with Tablet OS 2.1.0 and BlackBerry 10 (10.1 and 10.2) SDKs.
* Removed now-unneeded empty file.

Note that this commit will likely cause projects to not work with the Tablet OS 2.0.0 tooling. Considering that 2.1.0 released in April 2012, there should be no reasons to use a downlevel SDK. These changes improve compatibility with future SDK releases by removing the deprecated <action> tags and replacing them with <permission> tags.