[cipd] Bump cipd and vpython to versions that use v2 protocol by default.

R=iannucci@chromium.org, tandrii@chromium.org
BUG=801423

Change-Id: I28331e8b6210cbd972cc687fa71a234e75da4b95
Reviewed-on: https://chromium-review.googlesource.com/1119374Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Vadim Shtayura <vadimsh@chromium.org>

cipd_client_version

-git_revision:aacec5af4d569cee51437a89425db0b3c3d39a0a
+git_revision:b9c4670197dcefd8762d6e509302acd3efc6e303

cipd_manifest.txt

@@ -12,7 +12,7 @@ $VerifiedPlatform linux-386 linux-ppc64 linux-ppc64le linux-s390x
 $VerifiedPlatform linux-arm64 linux-armv6l linux-mips64
 
 # vpython.
-infra/tools/luci/vpython/${platform} git_revision:aacec5af4d569cee51437a89425db0b3c3d39a0a
+infra/tools/luci/vpython/${platform} git_revision:b9c4670197dcefd8762d6e509302acd3efc6e303
 
 # LUCI editor
 infra/tools/luci/led/${platform} git_revision:7ba61969ccbe1f9679661555f72ca947da508a70