update test for swift 1.2.

Author: nori0620

.travis.yml

@@ -1,4 +1,5 @@
 language: objective-c
+osx_image: xcode6.4
 
 script:
   - bundle exec rake default

SwiftFilePathTests/SwiftFilePathTests.swift

@@ -16,7 +16,7 @@ extension String {
     func match(pattern: String) -> Bool {
         var error : NSError?
         let matcher = NSRegularExpression(pattern: pattern, options: nil, error: &error)
-        return matcher?.numberOfMatchesInString(self, options: nil, range: NSMakeRange(0, self.utf16Count)) != 0
+        return matcher?.numberOfMatchesInString(self, options: nil, range: NSMakeRange(0, count(self.utf16))) != 0
     }
 
 }