[ELF] Extend symbol-order-warnings test case for ICF
[ELF] Extend symbol-order-warnings test case for ICF

Reviewed by: rafael

Differential Revision: https://reviews.llvm.org/D43336

There is some discussion as to the exact behaviour of combining ICF and
--symbol-ordering-file, but it seems beneficial to warn when attempting
to order the removed symbol regardless of the preferred approach.


git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@325333 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld