Updates to get FindBugs working correctly with "ant findbugs". From JRUBY-2292.

Thanks to James Abley for getting ivy+findbugs wired up nicely!

Author: headius

ivy/build.xml

@@ -53,7 +53,7 @@
     <taskdef name="findbugs" classpathref="check.path" classname="edu.umd.cs.findbugs.anttask.FindBugsTask"/>
 
     <findbugs classpathref="check.path" pluginList="" output="html" outputfile="${basedir}/jruby-findbugs.html" 
-              excludefilter="${basedir}/findbugs.xml">
+              excludefilter="${basedir}/findbugs.xml" jvmargs="-Xmx512M">
       <sourcepath path="${basedir}/source" />
       <class location="${jruby.classes.dir}" />
       <auxclasspath>

ivy/ivy.xml

@@ -10,6 +10,6 @@
     <artifact name="jruby-sources" />
   </publications>
   <dependencies>
-    <dependency org="com.google.code.findbugs" name="findbugs" rev="1.3.8" conf="check->*" />
+    <dependency org="com.google.code.findbugs" name="findbugs" rev="1.3.9" conf="check->*" />
   </dependencies>
 </ivy-module>