message: Roll back to using xcode 8.2
diff: @@ -384,11 +384,11 @@ def buildPerformance() {
  def doBuildMacOs(String buildType) {
  def sdk = 'macosx'
  return {
  - node('macos || osx') {
  + node('osx') {
  getArchive()
  dir("build-macos-${buildType}") {
  - withEnv(['DEVELOPER_DIR=/Applications/Xcode.app/Contents/Developer/']) {
  + withEnv(['DEVELOPER_DIR=/Applications/Xcode-8.2.app/Contents/Developer/']) {
  // This is a dirty trick to work around a bug in xcode
  // It will hang if launched on the same project (cmake trying the compiler out)
  // in parallel.
  @@ -424,10 +424,10 @@ def doBuildMacOs(String buildType) {
  def doBuildAppleDevice(String sdk, String buildType) {
  return {
  - node('macos || osx') {
  + node('osx') {
  getArchive()
  - withEnv(['DEVELOPER_DIR=/Applications/Xcode.app/Contents/Developer/']) {
  + withEnv(['DEVELOPER_DIR=/Applications/Xcode-8.2.app/Contents/Developer/']) {
  retry(3) {
  timeout(time: 15, unit: 'MINUTES') {
  runAndCollectWarnings(parser:'clang', script: """
  