JENKINS-26232 Make temporary directories configurable (added missing

help file)

src/main/resources/hudson/plugins/ec2/SlaveTemplate/help-tmpDir.html

@@ -0,0 +1,12 @@
+<div>
+  <p>
+    This will override the location of the temporary directory used for storing and executing the init script.
+    Leave empty to use the default value.<br />
+    Note: Make sure the remote user has execute permissions to this directory.<br />
+  </p>
+  <p>
+    If no value is provided the temporary directory will default to:<br />
+    - UNIX: /tmp<br />
+    - Windows: C:\\Windows\\Temp\\
+  </p>
+</div>