8191891: Update minumum Ant version in Nashorn build.xml

Reviewed-by: jlaskey, sundar
diff --git a/make/nashorn/build.xml b/make/nashorn/build.xml
index a622737..e3897b8 100644
--- a/make/nashorn/build.xml
+++ b/make/nashorn/build.xml
@@ -115,11 +115,11 @@
    </target>
   
 
-  <!-- check minimum ant version required to be 1.8.4 -->
+  <!-- check minimum ant version required to be 1.9.5 -->
   <target name="check-ant-version">
-    <property name="ant.version.required" value="1.8.4"/>
+    <property name="ant.version.required" value="1.9.5"/>
     <antversion property="ant.current.version" />
-    <fail message="The current ant version, ${ant.current.version}, is too old. Please use 1.8.4 or above.">
+    <fail message="The current ant version, ${ant.current.version}, is too old. Please use 1.9.5 or above.">
         <condition>
             <not>
                 <antversion atleast="${ant.version.required}"/>