[llvm-readelf/llvm-readobj] - Check the version of SHT_GNU_verneed section entries.

It is a follow-up for D70826 and it is similar to D70810.

SHT_GNU_verneed contains the following fields:
`vn_version`: Version of structure. This value is currently set to 1, and will be reset
if the versioning implementation is incompatibly altered.
(https://refspecs.linuxfoundation.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/symversion.html)

We should check it for correctness.

Differential revision: https://reviews.llvm.org/D70842