Introduced the new Mac Release bot.

NOTE: Possibly rename slave folder on master to mac-slave-3 from mac-slave-1 to keep history. Not sure if it is a good idea.

BUG=
TEST=

Review URL: https://webrtc-codereview.appspot.com/395001

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1642 4adac7df-926f-26a2-2b94-8c16560cd09d

tools/continuous_build/webrtc_buildbot/utils.py

@@ -453,11 +453,14 @@ class WebRTCMacFactory(WebRTCFactory):
       cmd = ["make", make, "-j100"]
       if make_extra is not None:
         cmd.append(make_extra)
+      if self.release:
+        cmd.append("BUILDTYPE=Release")
       self.AddCommonStep(cmd, descriptor=make_descriptor+["(make)"],
                          workdir="build/trunk")
     if self.build_type == "xcode" or self.build_type == "both":
+      configuration = "Release" if self.release else "Debug"
       cmd = ["xcodebuild", "-project", "webrtc.xcodeproj", "-configuration", 
-             "Debug", "-target", "All"]
+             configuration, "-target", "All"]
       self.AddCommonStep(cmd, descriptor=make_descriptor+["(xcode)"],
                          workdir="build/trunk")