The script that packages the Visual Studio toolchain had special code to
handle grabbing dbghelp.dll from the VS install and copying it to the
Debuggers directories. This was necessary around VS 2017 RTM to handle
/debug:fastlink but it now causes failures due to mismatched DLLs
leading to a missing ordinal. The hack shouldn't be needed anymore
because we no longer depend on /debug:fastlink (lld!) and because the
Debuggers package is assumed to have been updated to handle VS 2017 by
now.

Bug: 846313
Change-Id: I2b5fd87aaa785ce24a0905d70e7e586ff4838b1c
Reviewed-on: https://chromium-review.googlesource.com/1086990Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Bruce Dawson <brucedawson@chromium.org>