fix(diskpart): Fix diskpart argv when tmpdir contains spaces
fix(diskpart): Fix diskpart argv when tmpdir contains spaces

This escapes the diskpart script filename when shelling out,
to avoid failure when the username and thus the `os.tmpdir()` path
contains spaces.

Change-Type: patch

resin-io/etcher,resin-io/herostratus,resin-io/herostratus,resin-io/resin-etcher,resin-io/etcher,resin-io/etcher,resin-io/etcher,resin-io/resin-etcher,resin-io/etcher