Document need to clone its-base for buck-based build

Change-Id: Id6c130f39c24bc016349a3f6cd190656c6bd1535

src/main/resources/Documentation/build.md

diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index 5e696e9..c537f5f 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -1,19 +1,24 @@
 Build
 =====
 
-This plugin is built with Buck.
+This @PLUGIN@ plugin is built with Buck.
 
-Clone or link this plugin to the plugins directory of Gerrit's source
-tree, and issue the command:
+Clone (or link) both this plugin and also
+[plugins/its-base](https://gerrit-review.googlesource.com/#/admin/projects/plugins/its-base)
+to the `plugins` directory of Gerrit's source tree.
+
+Then issue
 
 ```
-  buck build plugins/its-bugzilla
+  buck build plugins/@PLUGIN@
 ```
 
+in the root of Gerrit's source tree to build
+
 The output is created in
 
 ```
-  buck-out/gen/plugins/its-bugzilla/its-bugzilla.jar
+  buck-out/gen/plugins/@PLUGIN@/@PLUGIN@.jar
 ```
 
 This project can be imported into the Eclipse IDE:
@@ -25,11 +30,12 @@
 To execute the tests run:
 
 ```
-  buck test --all --include its-bugzilla
+  buck test --all --include @PLUGIN@
 ```
 
-Note that for compatibility reasons a Maven build is provided, but is considered
-to be deprecated and will be removed in a future version of this plugin.
+Note that for compatibility reasons a Maven build is provided, but is
+considered to be deprecated and will be removed in a future version of
+this plugin.
 
 To build with Maven, change directory to the plugin folder and issue the
 command: