[patch] added dependency classpath to call to javah

Hi All,

Hope all is going well.

The current native:jniheader task only passes the $

path to the call to javah. Unfortunately this call fails if class files that have native methods require other classfiles that are located in jar dependencies. The attached patch fixes this by adding the jar dependency file locations to the call to javah.

Hope the attached patch is ok.

Cheers,

Marcus