issue #2325: [iOS] Using Workspace to manage all projects. TBD, also apply to Mac port.
issue #2325: [iOS] Adding missing workspace file.
issue #2325: Adding armv7s architecture.
issue #2325: Updating project configuration, tested on iPad 3.
Merge pull request #2981 from dumganhar/iss2325-ios-workspace

issue #2325: [iOS] Using Workspace to manage all projects. TBD, also apply to Mac port.