Missing errcode_ret pararmeter for clLinkProgram.

[kurtzmarc]

The Javadoc for LWJGL's clLinkProgram mentions a errcode_ret value for obtaining the error code when the program fails to link.

Otherwise clLinkProgram returns a NULL program object with an appropriate error in errcode_ret.

However there is no parameter for IntBuffer/int[] errcode_ret in the LWJGL API call. The OpenCL specification for clLinkProgram shows that there is a parameter for obtaining the errcode but this isn't exposed in the API clLinkProgram(..., cl_int *errcode_ret). A quick look through the javadoc and I also see clCreateSubDevices has this same issue.

[Spasi]

Duplicates #560. The fix is coming soon.