Add multidex ADT project to SDK.

(cherry picked from commit a6ca3cf29f8e5b3db1d23aa8ffaa35464d4c1019)

Change-Id: I44cf397dbc5649d9d701e2f8524a322d74c2aaa6
diff --git a/build/sdk.atree b/build/sdk.atree
index 91442be..65c93c5 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -365,6 +365,15 @@
 ${OUT_DIR}/target/common/obj/PACKAGING/android-support-v7-appcompat_intermediates/android-support-v7-appcompat.jar    extras/android/support/v7/appcompat/libs/android-support-v7-appcompat.jar
 ${OUT_DIR}/target/common/obj/PACKAGING/android-support-v4_intermediates/android-support-v4.jar                        extras/android/support/v7/appcompat/libs/android-support-v4.jar
 
+frameworks/support/multidex/README.txt                                                            extras/android/support/multidex/README.txt
+frameworks/support/multidex/.project                                                              extras/android/support/multidex/.project
+frameworks/support/multidex/.classpath                                                            extras/android/support/multidex/.classpath
+frameworks/support/multidex/AndroidManifest.xml                                                   extras/android/support/multidex/AndroidManifest.xml
+frameworks/support/multidex/project.properties                                                    extras/android/support/multidex/project.properties
+frameworks/support/multidex/src/.readme                                                           extras/android/support/multidex/src/.readme
+${OUT_DIR}/target/common/obj/PACKAGING/android-support-multidex_intermediates/android-support-multidex.jar              extras/android/support/multidex/libs/android-support-multidex.jar
+${OUT_DIR}/target/common/obj/PACKAGING/android-support-v13_intermediates/android-support-v13.jar                        extras/android/support/multidex/libs/android-support-v13.jar
+
 frameworks/support/v7/mediarouter/README.txt                                                       extras/android/support/v7/mediarouter/README.txt
 frameworks/support/v7/mediarouter/.project                                                         extras/android/support/v7/mediarouter/.project
 frameworks/support/v7/mediarouter/.classpath                                                       extras/android/support/v7/mediarouter/.classpath