Documentation: Add missing footer that links to plugin index page

Change-Id: Ic5bd9ac328b0842e53d85c9af5e76e0f217eba94
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index 5cc21c0..fd60c88 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -50,3 +50,7 @@
 ```
 ./tools/eclipse/project.sh
 ```
+
+[Back to @PLUGIN@ documentation index][index]
+
+[index]: index.html