[LU-1047] Fix some error messages in mkfs.lustre to use strerror

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.3.0
• Severity: 3
• Assignee: Johann Lombardi (Inactive)
• Reporter: Johann Lombardi (Inactive)

Description

Seen in the lab:

00:51:50:00:51:50:fat-intel-3vm3: mkfs.lustre: Unable to create backing store: 2
00:51:50:00:51:50:fat-intel-3vm3: mkfs.lustre: Unable to truncate backing store: 2