Documentation: Add missing footer that links to plugin index page

Change-Id: I6970a4e4c84e5f0e8621450cd08a2e0132e697d5
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index 40a9cc4..3dd3a01 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -26,3 +26,7 @@
 ```
   ./tools/eclipse/project.py
 ```
+
+[Back to @PLUGIN@ documentation index][index]
+
+[index]: index.html
\ No newline at end of file