add explicit xulrunner
diff --git a/releng.wtpbuilder/distribution/jsdt.tests/build.xml b/releng.wtpbuilder/distribution/jsdt.tests/build.xml
index 5f48ca5..f640aa9 100644
--- a/releng.wtpbuilder/distribution/jsdt.tests/build.xml
+++ b/releng.wtpbuilder/distribution/jsdt.tests/build.xml
@@ -153,6 +153,7 @@
         <property
             name="test-vm"
             value="${env.JAVA_6_HOME}/bin/java"/>
+    	<echo message="WTP_XULRUNNER: ${env.WTP_XULRUNNER}"  />
        <condition
            property="xulRunnerParam"
            value="-Dorg.eclipse.swt.browser.XULRunnerPath=${env.WTP_XULRUNNER}"
@@ -160,6 +161,7 @@
            <isset
                property="env.WTP_XULRUNNER"/>
        </condition>
+       <echo message="xulRunnerParam: ${xulRunnerParam}"  />
         <property
             name="vmargs"
             value="-Xmx512m -Dosgi.ws=${env.BASEWS} -Dosgi.os=${env.BASEOS} -Dosgi.arch=${env.BASEARCH} -Dws=${env.BASEWS} -Dos=${env.BASEOS} -Darch=${env.BASEARCH} -Dnoclean=true -DbuildBranch=${buildBranch} -DbuildType=${buildType} -DbuildId=${buildId} -DtestRoot=${testRoot} -DtestDir=${testRoot} -DbuildDirectory=${buildDirectory} -Dbuild.home=${env.BUILD_HOME} -DeclipseBuilderDirectory=${pde.builder.path} -DbuildLabel=${buildLabel} -Dtest-vm=${test-vm}  -Dperf.buildId=${buildType}${date}-${time}"/>