Include com.sun.tools dependency only if Java 8

This change causes com.sun.tools to be included as a dependency only if
the JDK version is 1.8.

Author: sideshowbarker

pom.xml

@@ -72,6 +72,22 @@
     <connection>scm:hg:http://hg.mozilla.org/projects/htmlparser/</connection>
     <url>http://hg.mozilla.org/projects/htmlparser/</url>
   </scm>
+  <profiles>
+    <profile>
+      <activation>
+        <jdk>1.8</jdk>
+      </activation>
+      <dependencies>
+        <dependency>
+          <groupId>com.sun</groupId>
+          <artifactId>tools</artifactId>
+          <version>1.5.0</version>
+          <scope>system</scope>
+          <systemPath>${java.home}/../lib/tools.jar</systemPath>
+        </dependency>
+      </dependencies>
+    </profile>
+  </profiles>
   <build>
     <sourceDirectory>${project.build.directory}/src</sourceDirectory>
     <testSourceDirectory>${basedir}/test-src</testSourceDirectory>