This is causing a deadlock on Windows 7. The process teardown is
calling a destructor function that ends up calling a bunch of
synchronization logic that should not be called on process exit.

Bug: b/141380274
Bug: angleproject:3909
Change-Id: I4787d495d965e8b43d15be9c952c4b1de9bdf197
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/36548
Presubmit-Ready: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>