FreeBSD_HEAD_arm64 - Build #4380 - Fixed

[jenkins-admin at FreeBSD.org]

FreeBSD_HEAD_arm64 - Build #4380 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_arm64/4380/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_arm64/4380/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_arm64/4380/console

Change summaries:

310124 by andrew:
Add -fPIC to the ubldr build. Without this the self relocation code will
try to use an absolute address in a switch statement, jumping to an invalid
memory location.

Sponsored by:	ABT Systems Ltd

310122 by manu:
Fix building arm64 kernel after r310117

Pointy hat: me

MFC after:	3 days

310118 by asomers:
Fix ls_tests:o_flag with ZFS TMPDIR

Unlike UFS or TMPFS, ZFS sets uarch automatically whenever a file is
updated. The test must explicitly clear uarch to be portable across
filesystems. Also, it doesn't need to run as root.

PR:		215179
MFC after:	4 weeks
Sponsored by:	Spectra Logic Corp
Differential Revision:	https://reviews.freebsd.org/D8741