qemurunner: Ensure pid location is deterministic
The pid location could vary due to changes in cwd as only a filename
is specified, not a full path. This in theory could be resulting in
some of our autobuilder failures. Whilst its difficult to know if this
is causing a problem, Using a full path removes any question of such an
issue.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit
55c186ff410c99570242478b99ac24ebc40aa6bd)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
