libkver: relax fuzzer check.

For strings like 5.4-android1-00, the result of
parsing it then reconverting it back to a string
is 5.4-android1-0, so the equality check fails.

Relax the check.

Test: manual with the new corpus
Fixes: 319755035
Change-Id: Ifbd006b071cabb939d86bd9f9b7a04f241ee670f