Rename Groovy sample file with a .gradle extension

samples/Groovy/build.script!

@@ -0,0 +1,17 @@
+task echoDirListViaAntBuilder() {
+    description = 'Uses the built-in AntBuilder instance to echo and list files'
+    //Docs: http://ant.apache.org/manual/Types/fileset.html
+    
+    //Echo the Gradle project name via the ant echo plugin
+    ant.echo(message: project.name)
+    ant.echo(path)
+    ant.echo("${projectDir}/samples")
+    
+    //Gather list of files in a subdirectory
+    ant.fileScanner{
+        fileset(dir:"samples")
+    }.each{
+        //Print each file to screen with the CWD (projectDir) path removed.
+        println it.toString() - "${projectDir}"
+    }
+}