Allow to create .nv directory
Update nvidia abstraction to allow creating NVIDIA-specific user directories in case it is missing (due to fresh $HOME or if manually removed for any reason).
Relevant DENIED messages:
type=AVC msg=audit(1518792535.038:410): apparmor="DENIED" operation="mkdir" profile="/usr/bin/glxgears" name="/home/vincas/.nv/" pid=13418 comm="glxgears" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
type=AVC msg=audit(1518792658.308:428): apparmor="DENIED" operation="mkdir" profile="/usr/bin/glxgears" name="/home/vincas/.nv/GLCache/" pid=13524 comm="glxgears" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000