Setting ONLY_ACTIVE_ARCH=YES

.travis.yml

@@ -5,4 +5,4 @@ before_install:
 script:
 - set -o pipefail
 - xcodebuild -project Alamofire.xcodeproj -scheme Alamofire test -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO | xcpretty -c
-- xcodebuild -project "iOS Example.xcodeproj" -scheme "iOS Example" build -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO | xcpretty -c
+- xcodebuild -project "iOS Example.xcodeproj" -scheme "iOS Example" build -sdk iphonesimulator ONLY_ACTIVE_ARCH=YES | xcpretty -c