Simple patch for langtools build script

[Jonathan Gibbons]

Jesse,

Thank you for your suggestions w.r.t. langtools.

-- Jon


On 06/29/2010 10:10 AM, Jesse Glick wrote:
> 1. Use ${ant.core.lib} as it makes fewer assumptions about the layout 
> of the Ant installation than ${ant.home}/lib/ant.jar.
>
> 2. Pass includeantruntime="false" in all cases to best control what 
> goes into the classpath.