message: Update to Xcode 9.1 and iOS SDK 11.1 versions
  ORIGINAL_AUTHOR=Haris Andrianakis
  GitOrigin-RevId:
diff: @@ -62,8 +62,8 @@ run_linux_tests() {
  run_macos_tests() {
  # Default values for iOS SDK and Xcode. Can be overriden by another script.
  - : "${IOS_SDK_VERSION:=10.2}"
  - : "${XCODE_VERSION:=8.2.1}"
  + : "${IOS_SDK_VERSION:=11.1}"
  + : "${XCODE_VERSION:=9.1}"
  time ${BAZEL_BIN} fetch ...
  