Add destination to e2e xcode build

Summary: Closes https://github.com/facebook/react-native/pull/10286

Differential Revision: D3987787

Pulled By: bestander

fbshipit-source-id: fc6295f499bc2d47e52c855080952353568bd7b7

.travis.yml

@@ -1,6 +1,6 @@
 language: objective-c
 
-osx_image: xcode7.3
+osx_image: xcode8
 
 install:
   - mkdir -p /Users/travis/build/facebook/.nvm

scripts/run-ci-e2e-tests.js

@@ -172,7 +172,7 @@ try {
     if (tryExecNTimes(
       () => {
         exec('sleep 10s');
-        return exec('xcodebuild -scheme EndToEndTest -sdk iphonesimulator test | xcpretty && exit ${PIPESTATUS[0]}').code;
+        return exec('xcodebuild -destination "platform=iOS Simulator,name=iPhone 5s,OS=10.0" -scheme EndToEndTest -sdk iphonesimulator test | xcpretty && exit ${PIPESTATUS[0]}').code;
       },
       numberOfRetries)) {
         echo('Failed to run iOS e2e tests');