Docs: Add definition of target to BE common definitions
@@ -57,7 +57,9 @@ many functions or build rules.
expansion: if those strings contain a valid label as a
substring, such as <code>//mypkg:target</code>, and that label is a
declared prerequisite of the current rule, it is expanded into the
- pathname of the file represented by the target <code>//mypkg:target</code>.
+ pathname of the file represented by the
+ <a href="https://docs.bazel.build/versions/master/glossary.html#target">target</a>
+ <code>//mypkg:target</code>.
</p>
<p>
