Added Tool as Dependency to tests & fixed warnings

Summary: Fixes http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap-msan/builds/14002 and http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/35392/steps/build_Lld/logs/stdio

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65843

llvm-svn: 368117