Add building through maven.

Change-Id: Idf42a60a14ee2ffdf6bd5c7dd72f14ef307fcf9a
diff --git a/pom.xml b/pom.xml
index d5a0e73..2a874ca 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,6 +62,19 @@
           <target>1.7</target>
         </configuration>
       </plugin>
+      <plugin>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <configuration>
+          <archive>
+            <manifest>
+              <mainClass>com.google.gwt.benchmark.compiler.BenchmarkingHarness</mainClass>
+            </manifest>
+          </archive>
+          <descriptorRefs>
+            <descriptorRef>jar-with-dependencies</descriptorRef>
+          </descriptorRefs>
+        </configuration>
+      </plugin>
     </plugins>
   </build>
 </project>
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