win/libc++/natvis: Add support for unordered_(multi)?(map|set).

See http://bannalia.blogspot.com/2013/10/implementation-of-c-unordered.html for
why we can just walk a single linked list instead of looking in the
__bucket_list_.

Bug: 947911
Change-Id: I328ce6109e5b507cc9bdd02a5fd4f88e84678674
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1576234
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Auto-Submit: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652783}
1 file changed