Roll src/native_client/ 87616f7ce..fd20fafa8 (4 commits)

https://chromium.googlesource.com/native_client/src/native_client.git/+log/87616f7ce2ea..fd20fafa8ec1

$ git log 87616f7ce..fd20fafa8 --date=short --no-merges --format='%ad %ae %s'
2020-06-22 brucedawson Use clang-cl to preprocess nacl assembly files
2020-06-03 fabiansommer Change ARM trybot up/download directory
2020-05-27 fabiansommer Rename CI ARM hw bots
2020-04-27 fabiansommer Enable debug build mode on debug builders.

Created with:
  roll-dep src/native_client

Bug: chromium:1097510
Change-Id: I56fac21b50062f726b8f8309999c678f0f097fd6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2260933
Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781395}

DEPS

@@ -229,7 +229,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling NaCl
   # and whatever else without interference from each other.
-  'nacl_revision': '87616f7ce2ea8383efd3731960c15f4ba5852d93',
+  'nacl_revision': 'fd20fafa8ec19700e12daa031bf792bae8b6bb21',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling freetype
   # and whatever else without interference from each other.