iOS: fixed bug whereby some SDL testing apps weren't launching

Test apps in Xcode-iOS/Test/TestiPhoneOS.xcodeproj weren't launching
in the most-recent release of Xcode and the iOS Simulator (version 11.3.1).
This was caused by their shared Info.plist file not defining a
CFBundleShortVersionString (as reported by Xcode, when launching a test
app from within Xcode).
1 file changed