Documentation: Refactor footer to match with other plugins

Fix a typo where Buck was used instead of Bazel. Add footer section
that links to plugin's index page as it has been done in other plugins.

Change-Id: Ic4de629a35908e7a4becb9956ca0d13c72c1c321
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index 10bdbbc..d3805cf 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -82,5 +82,9 @@
   ./tools/eclipse/project.py
 ```
 
-More information about Buck can be found in the [Gerrit
+More information about Bazel can be found in the [Gerrit
 documentation](../../../Documentation/dev-bazel.html).
+
+[Back to @PLUGIN@ documentation index][index]
+
+[index]: index.html