Build ghostscript-native fails on a i686 machine because it can't get
the source objarch.h and soobjarch.h, and .h files are not needed for
native package, so update the SRC_URI to fix it.
Signed-off-by: Kang Kai <kai.kang@windriver.com>
Removed the do_configure_prepend and folded into the target do_configure
since the native was picking it up for the do_configure_virtclass/native()
and then failing on i686.
