On OpenRISC variadic functions and regular functions have different
calling conventions so this wrapper is needed to translate. This
wrapper is copied from x86_64/x32. I don't know the build system enough
to find a cleaner way to share the code between x86_64/x32 and or1k
(maybe Implies?), so I went with the straight copy.
This fixes test failures:
misc/tst-prctl
nptl/tst-setgetname
