Analog to the runtime package, syscall.Select should be using
newselect instead of select. This change addresses this problem and
regenerates zsyscall_linux_* for ppc64 and ppc64le.

Updates #21946

Change-Id: I5dc3bf9e7f0b1172d6cce30ddf3bb1e3c95ec8e9
Reviewed-on: https://go-review.googlesource.com/65090
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>