[LU-9775] find kernel-devel even if the current kernel is not installed in the build root

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.1, Lustre 2.11.0
• Affects Version/s: Lustre 2.10.0
• Assignee: Brian Murrell (Inactive)
• Reporter: Brian Murrell (Inactive)

Description

If one is building in a build [ch]root such as mock provides, one may not have the kernel installed which corresponds to $(uname -r).

In such a case, also try to look for the kernel-devel in /usr/src/kernels/ and just build for the latest one.  Ideally there is only one installed in any case.