Correct linking order for builds with perfevent.

Author: erik-brangs

build.xml

@@ -1837,7 +1837,7 @@ Check to make sure all required properties are specified. This includes properti
       </conditions>
       <sequential>
         <exec executable="${c++.exe}" failonerror="true">
-          <arg line="${c++.args} ${rvm.common.args} ${gcspy.lib.dir} ${perfevent.lib} ${rvm.src} ${c++.librt} -lpthread ${c++.rdynamic} -g"/>
+          <arg line="${c++.args} ${rvm.common.args} ${gcspy.lib.dir} ${rvm.src} ${perfevent.lib} ${c++.librt} -lpthread ${c++.rdynamic} -g"/>
           <arg value="-o"/>
           <arg value="${build.base}/JikesRVM"/>
           <arg value="-L${build.base}"/>
@@ -1852,7 +1852,7 @@ Check to make sure all required properties are specified. This includes properti
       </conditions>
       <sequential>
         <exec executable="${c++.exe}" failonerror="true">
-          <arg line="${c++.args} ${rvm.common.args} ${gcspy.lib.dir} ${perfevent.lib} ${rvm.src} ${c++.librt} -lpthread ${c++.rdynamic} -g"/>
+          <arg line="${c++.args} ${rvm.common.args} ${gcspy.lib.dir} ${rvm.src} ${perfevent.lib} ${c++.librt} -lpthread ${c++.rdynamic} -g"/>
           <arg value="-o"/>
           <arg value="${build.base}/JikesRVM"/>
           <arg value="-L${build.base}"/>