A better fix for creating src.jar. Using tar by itself fails because the
argument list is too long. Hence the first patch invoked tar once for
each file. This works, but is inefficient. This version of the patch
uses cpio in pass through mode to copy all the files at once.
Submitted by: "Remco van 't Veer" <firstname.lastname@example.org>
Reviewed by: sobomax
Approved by: sobomax