[cipd] Update CIPD 2.2.15 -> 2.2.16.

Includes a bug fix for incorrect handling of subcommands with typos in them. No
other changes.

BUG=931755
R=iannucci@chromium.org

Change-Id: I4a3c523452939bdb5a6f26637f1f7b4a2eeb4b0c
Reviewed-on: https://chromium-review.googlesource.com/c/1474373
Auto-Submit: Vadim Shtayura <vadimsh@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>

cipd_client_version

-git_revision:6e4acf51a635665e54acaceb8bd073e5c7b8259a
+git_revision:cc015d8903532826f4430b87501a3c542ef468ce

cipd_client_version.digests

 # This file was generated by
 #
 #  cipd selfupdate-roll -version-file cipd_client_version \
-#      -version git_revision:6e4acf51a635665e54acaceb8bd073e5c7b8259a
+#      -version git_revision:cc015d8903532826f4430b87501a3c542ef468ce
 #
 # Do not modify manually. All changes will be overwritten.
 # Use 'cipd selfupdate-roll ...' to modify.
 
-linux-386       sha256  bdb4e3c30cffddc650c791c78658b272173b638dc15aa74e2f1a28c41b5478bd
-linux-amd64     sha256  444addec6f9a87a3531519b404114e11a855cba41751be70c4383a0343e1e535
-linux-arm64     sha256  6cf92ce8ed3f5e0fafb44285cef777e5e7ffd50e4db892c0b25b06ea0accd7d5
-linux-armv6l    sha256  3f328f73191f3bd7f1e059f393929b341e99c9a33b7d49b96c8a87acd5df2b32
-linux-mips64    sha256  f5efa022177ae392621118a28bf04e59400960b392bc2ab49e321c6919728b28
-linux-mips64le  sha256  74067227f1c7123f0269588a1e910ffd5d6d806133fe62a1feeade27bde86bd3
-linux-mipsle    sha256  ecdc2fe38d10864e63bce742c105e816cec26237596b341a94e712fbbc482ef4
-linux-ppc64     sha256  d492b05890e57e1beeaa6161099aa5e1d3b7eec590cefbbd3ba221e9c99e5a6b
-linux-ppc64le   sha256  7a54d781defee4dbdaa5a5d2b2327af7cd3760e7ed8b3652a20f173998a925c4
-linux-s390x     sha256  802b8f6d8acf57fe656efd927439d8b6a475619b761aaa800b7909660ce91718
-mac-amd64       sha256  fc5fb99acd78c3a86ebf1d91b8198479d1cb3606f1594c0bb1e0d72d77ac3bb4
-windows-386     sha256  869d528a0d4b19e4226cd2cfc1da9984f29ed298130a4dc0da2f549f2a265961
-windows-amd64   sha256  82dda1326a2e7abfb6e8d5bc85548a1f0324d45dfecf9e4933a37c9148d90d20
+linux-386       sha256  53e77ece8a64fdf787804acff7960279386dcaa8567128565d85bb3c970ba939
+linux-amd64     sha256  9681fac4e6de87903ae0bd5dfdbbb6c2906b8c70efee1c66c171d6d3106990e3
+linux-arm64     sha256  aa6815b1a1399134762899f3e26a622ff1f23e5c8583a166fa97031d361549c4
+linux-armv6l    sha256  f021b69948004d7b4fff9e1e60eb8d1e322c155e8a337408976a253c071be245
+linux-mips64    sha256  dfca413b5fc70d56a0f90960dd7de579401e79878b2dd262b7977ddf0d573668
+linux-mips64le  sha256  b8fe862cae5ac04e09fb96d5fa31a95ef01b412139727fb478180865d8b41bd8
+linux-mipsle    sha256  8527b9f4b5888f4757bdf4d2f0c74eb11f603043e453ae687e79b0f47add5d55
+linux-ppc64     sha256  350906c433d216a2d9edf2eefa1ea19852aa2c8f8402959539cbb1e96f81738d
+linux-ppc64le   sha256  5921f64df6b72c52db60dd54e5c9e14a8fcb79d30c03c02730ef1e4b0ed14cc7
+linux-s390x     sha256  9a5d107446dc082bf0ea4f03ce96b03d2af1f464d95f12529a4b0b0bc175650b
+mac-amd64       sha256  60478796d567b6d7801d0feb6226f7b8576366c2a77e3c8a6ffd8108e5c48bf5
+windows-386     sha256  fabf816aa2c1871058a87afc2563071dd754e0bc0232dc6709907f98e6fc8ede
+windows-amd64   sha256  40c4cf6e0edaafea228e9314caf665dcffdf182e8a1d3bb8bbeac64c8a9b080e