Add template for build.gradle

Provides the template needed by 'android create project' to create
the file build.gradle.

Change-Id: I689a76573afd2c4d0454deca3ed694f1fb46065e
Signed-off-by: Jeff Smith <whydoubt@gmail.com>
diff --git a/build/tools.atree b/build/tools.atree
index 2bb0afd..e413484 100644
--- a/build/tools.atree
+++ b/build/tools.atree
@@ -81,9 +81,10 @@
 lib/lib64EGL_translator${DLL_EXTENSION}       strip tools/lib/lib64EGL_translator${DLL_EXTENSION}
 
 
-# sdk.git Ant templates for project build files
+# sdk.git Ant and gradle templates for project build files
 sdk/templates/build.template                        tools/lib/build.template
 sdk/templates/uibuild.template                      tools/lib/uibuild.template
+sdk/templates/build_gradle.template                 tools/lib/build_gradle.template
 sdk/files/proguard-project.txt                      tools/lib/proguard-project.txt
 sdk/files/proguard-android.txt                      tools/proguard/proguard-android.txt
 sdk/files/proguard-android-optimize.txt             tools/proguard/proguard-android-optimize.txt