Revert "Disable the warning of a hidden symbol matches a reference to be resolved."

Bug: 21502954

This change reverts https://android-review.googlesource.com/#/c/155101/, to be
replaced by the upstream patch with tests.
  - https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commitdiff;h=c20ceeb226168ffd84078ef74d890c2b7f69a435

Change-Id: Id929c8422a016638f860ac508eeafc7080584600
2 files changed
tree: c5d81e8da334346e9bbc6962fc5d7d50d3d80076
  1. binutils-2.25/