[ELF][llvm-objdump] Treat dynamic tag values as virtual addresses instead of offsets

The ELF gABI requires the tag values of DT_REL, DT_RELA and DT_JMPREL to be
treated as virtual addresses. They were treated as offsets. Fixes PR41832.

Differential Revision: https://reviews.llvm.org/D62972

llvm-svn: 362969