message: kokoro: Update kokoro tests to use Xcode 9.2 on macOS.
  Also, enabled the iOS tests.
  GitOrigin-RevId:
diff: @@ -63,8 +63,8 @@ run_linux_tests() {
  run_macos_tests() {
  # Default values for iOS SDK and Xcode. Can be overriden by another script.
  - : "${IOS_SDK_VERSION:=11.1}"
  - : "${XCODE_VERSION:=9.1}"
  + : "${IOS_SDK_VERSION:=11.2}"
  + : "${XCODE_VERSION:=9.2}"
  time bazel fetch ...
  @@ -79,6 +79,18 @@ run_macos_tests() {
  --xcode_version="${XCODE_VERSION}" \
  --verbose_failures \
  //objc/... || ( ls -l ; df -h / ; exit 1 )
  +
  + # Run the iOS tests.
  + time bazel test $DISABLE_SANDBOX \
  + --compilation_mode=dbg \
  + --dynamic_mode=off \
  + --cpu=ios_x86_64 \
  + --ios_cpu=x86_64 \
  + --experimental_enable_objc_cc_deps \
  + --ios_sdk_version="${IOS_SDK_VERSION}" \
  + --xcode_version="${XCODE_VERSION}" \
  + --verbose_failures \
  + //objc:TinkTests || ( ls -l ; df -h / ; exit 1 )
  }
  if [[ $PLATFORM == 'darwin' ]]; then
  