Add master and lollipop OS X environment details

The master branch is currently buildable on OS X 10.8-10.10 with Xcode
4.5.2-6.1, but Lollipop is only buildable on OS X 10.8 with Xcode 4.5.2.
This patch adds in the information to the OS X build environment section
to reflect this.

Change-Id: Ib99a6f717d3d5f0086b7e6f32023e0aace9dae8b
diff --git a/src/source/initializing.jd b/src/source/initializing.jd
index 3283575..a374850 100644
--- a/src/source/initializing.jd
+++ b/src/source/initializing.jd
@@ -241,11 +241,23 @@
 <p>Once mounted, you'll do all your work in the "android" volume. You can eject it (unmount it) just like you would with an external drive.</p>
 <h3 id="master-branch">Master branch</h3>
 <p>To build the latest source in a Mac OS environment, you will need an Intel/x86
-machine running MacOS 10.8 (Mountain Lion), along with Xcode
-4.5.2 and Command Line Tools.</p>
+machine running MacOS 10.8 (Mountain Lion) or later, along with Xcode
+4.5.2 or later including the Command Line Tools.</p>
+
 <p>You will also need the <a
 href="http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html">Java 7 JDK</a>.
-Select the file: jdk-7u51-macosx-x64.dmg</p>
+Select the file: jdk-7u71-macosx-x64.dmg</p>
+
+<h3 id="branch-50x-and-all-earlier-branches">Branch 5.0.x and earlier branches</h3>
+<p>To build 5.0.x and earlier source in a Mac OS environment, you will need an Intel/x86
+machine running MacOS 10.8 (Mountain Lion), along with Xcode
+4.5.2 and Command Line Tools.</p>
+
+<p>You will also need the <a
+href="http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html">Java 7 JDK</a>.
+Select the file: jdk-7u71-macosx-x64.dmg</p>
+
+<h3 id="branch-44x-and-all-earlier-branches">Branch 4.4.x and earlier branches</h3>
 
 <p>To develop for versions of Android Gingerbread through KitKat, download and
 install the Java 6 version of the <a