reuseport_bpf_numa in net from ubuntu_kernel_selftests failed on i386

== SRU Justification ==
The reuseport_bpf_numa test in net category from ubuntu_kernel_selftests
will fail on i386 systems with:
  selftests: reuseport_bpf_numa
  ========================================
  not ok 1..3 selftests: reuseport_bpf_numa [FAIL]

If you run it directly, you will see the test is simply not supported.
  $ sudo ./reuseport_bpf_numa
  ./reuseport_bpf_numa: no numa api support: Function not implemented

== Fix ==
* 1a2b80ec (selftests: net: reuseport_bpf_numa: don't fail if no numa
 support)

We have this patch in newer kernel from D, and we don't run this test
on Xenial so only Bionic needs this patch.

== Test ==
Tested on a Bionic i386 node and it works as expected.
  selftests: reuseport_bpf_numa
  ========================================
  1..0 # Skipped: no numa api support
  ok 1..3 selftests: reuseport_bpf_numa [PASS]

== Regression Potential ==
Low, trival change to testing tool itself.

== Original Bug Report ==
Test failed with:
    $ sudo ./reuseport_bpf_numa
    ./reuseport_bpf_numa: no numa api support: Function not implemented

Maybe this one should be skipped.

selftests: reuseport_bpf_numa
 ========================================
 not ok 1..3 selftests: reuseport_bpf_numa [FAIL]

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-43-generic 4.15.0-43.46
ProcVersionSignature: User Name 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic i686
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Jan 21 10:52 seq
 crw-rw---- 1 root audio 116, 33 Jan 21 10:52 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: i386
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Mon Jan 21 11:06:26 2019
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
MachineType: Dell Inc. PowerEdge R310
PciMultimedia:

ProcFB: 0 mgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=6aaa11f6-d386-4c0c-b4b8-38e6c408980a ro console=ttyS0,115200n8
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-43-generic N/A
 linux-backports-modules-4.15.0-43-generic N/A
 linux-firmware 1.173.3
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/18/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.11.0
dmi.board.name: 05XKKK
dmi.board.vendor: Dell Inc.
dmi.board.version: A05
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.11.0:bd09/18/2012:svnDellInc.:pnPowerEdgeR310:pvr:rvnDellInc.:rn05XKKK:rvrA05:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge R310
dmi.sys.vendor: Dell Inc.