Docs: Rename pages to match their purposes

Bug: 10117610
Change-Id: Idbe82e3d7ce328d03ece123c5bd6b46117dc4888
diff --git a/src/source/64-bit-builds.jd b/src/source/64-bit-builds.jd
index 2373886..ad174fb 100644
--- a/src/source/64-bit-builds.jd
+++ b/src/source/64-bit-builds.jd
@@ -1,4 +1,4 @@
-page.title=Android Platform 64-bit Build Instructions
+page.title=Understanding 64-bit Builds
 @jd:body
 
 <!--