0.0.20171122 build error on weird chromebook kernel

[Jaron Kent-Dobias]

Hey Jason,

The new snapshot has a build error for me on my weird chromeos kernel [1]
(with some archlinux patches and built with -fno-pic added to the
Kbuild CFLAGs for wireguard). The dkms make.log is below...

Thanks,
Jaron

[1] https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-3.14

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DKMS make.log for wireguard-0.0.20171122 for kernel 3.14.0-26-ARCH (armv7l)
Wed Nov 22 18:13:02 EST 2017
make: Entering directory '/usr/lib/modules/3.14.0-26-ARCH/build'
  LD      /var/lib/dkms/wireguard/0.0.20171122/build/built-in.o
  CC [M]  /var/lib/dkms/wireguard/0.0.20171122/build/main.o
  CC [M]  /var/lib/dkms/wireguard/0.0.20171122/build/noise.o
  CC [M]  /var/lib/dkms/wireguard/0.0.20171122/build/device.o
  CC [M]  /var/lib/dkms/wireguard/0.0.20171122/build/peer.o
/var/lib/dkms/wireguard/0.0.20171122/build/noise.c: In function ?tai64n_now?:
/var/lib/dkms/wireguard/0.0.20171122/build/noise.c:352:20: error: storage size of ?now? isn?t known
  struct timespec64 now;
                    ^~~
/var/lib/dkms/wireguard/0.0.20171122/build/noise.c:354:2: error: implicit declaration of function ?getnstimeofday64?; did you mean ?getnstimeofday?? [-Werror=implicit-function-declaration]
  getnstimeofday64(&now);
  ^~~~~~~~~~~~~~~~
  getnstimeofday
/var/lib/dkms/wireguard/0.0.20171122/build/noise.c:352:20: warning: unused variable ?now? [-Wunused-variable]
  struct timespec64 now;
                    ^~~
cc1: some warnings being treated as errors
make[1]: *** [scripts/Makefile.build:308: /var/lib/dkms/wireguard/0.0.20171122/build/noise.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:1298: _module_/var/lib/dkms/wireguard/0.0.20171122/build] Error 2
make: Leaving directory '/usr/lib/modules/3.14.0-26-ARCH/build'
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