[ELF] - cref.s: check that we print symbols from archives. NFCI.
[ELF] - cref.s: check that we print symbols from archives. NFCI.

This is consistent with bfd and we already supported it,
though test did not contain the explicit check.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@328967 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld