try to fix travis by specifying toolchain

Author: Lutzifer

.travis.yml

@@ -11,7 +11,7 @@ install:
   - pod install --project-directory=ExampleProject/CodeGenerationExample
 script:
   - ruby -X Tests test.rb
-  - scan --scheme CodeGenerationExample --workspace ExampleProject/CodeGenerationExample/CodeGenerationExample.xcworkspace
+  - scan --scheme CodeGenerationExample --workspace ExampleProject/CodeGenerationExample/CodeGenerationExample.xcworkspace  -x "TOOLCHAINS=com.apple.dt.toolchain.Swift_3_0"
 rvm:
   - 2.0
   - 2.3