Even on the highest optimization level MSVC was still generating extra
code in Release for ASSERT macros. This realigns the code more with
Chromium by using a streaming eating macro with the expression at the
end. Now no code should be generating. I believe this did not affect
Clang builds.

Bug: angleproject:1671
Change-Id: I099c59cf0b28ae3ffc08b864982e67559901724e
Reviewed-on: https://chromium-review.googlesource.com/1036208Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>