[benchmark] Re-enable benchmarks on all platforms including Windows

The assertion in MCCodeView.cpp was resolved in r340878.

This reverts both r340905 and r340836, making benchmarks build by
default everywhere.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@341716 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed