title: "${PODS_ROOT}/SwiftLint/swiftlint" causes "Command PhaseScriptExecution failed with a nonzero exit code" with Xcode 10
body: <p>Updating from Xcode 10.0 beta 2 to <strong>Xcode 10.0 beta 3</strong> I now get this error at build time for an iOS project:</p>
  
  <blockquote>
    <p>sourcekit: [1:connection-event-handler:10499: 0.0000] Connection interruptsourcekit: [1:updateSemanticEditorDelay:10499: 0.0007] disabling semantic editor for 10 secondssourcekit: [1:pingService:10499: 0.0007] pinging servicesourcekitten: connection to SourceKitService restored!<br>
    Connection interrupted<br>
    Never call this for file that sourcekitd fails.: file File+Cache.swift, line 127<br>
    /Users/Coeur/Library/Developer/Xcode/DerivedData/My-App-eloayqptodupvfhbyegtkncnhcpu/Build/Intermediates.noindex/My-App.build/UAT-iphonesimulator/My-App-Debug.build/Script-379156A71D62F5C100574D04.sh: line 2: 34382 Abort trap: 6           "${PODS_ROOT}/SwiftLint/swiftlint"<br>
    Command PhaseScriptExecution failed with a nonzero exit code</p>
  </blockquote>
  
  <p>Swift 4.1<br>
  CocoaPods 1.5.3<br>
  SwiftLint 0.26.0  </p>