Gregor Jasny authored Mar 20, 2015 and Brad King committed Mar 24, 2015

The Xcode 5 platform specific framework locations differ from the Xcode
6 ones.  Look first for the Xcode 6 ones, then for iOS Xcode 5 ones and
last for the Xcode 5 OS X ones.

For reference, the XCTest.framework is located as follows:

 Xcode511.app/Contents/Developer/Library/Frameworks/XCTest.framework
 Xcode511.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk/Developer/Library/Frameworks/XCTest.framework
 Xcode511.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/Developer/Library/Frameworks/XCTest.framework

 Xcode601.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks/XCTest.framework
 Xcode601.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks/XCTest.framework
 Xcode601.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks/XCTest.framework

Signed-off-by: Gregor Jasny <gjasny@googlemail.com>