Add the crcmod wheel for gsutil, to get it to shut up.

Hopefully this will also actually speed up downloads
like it claims it will :).

Bug: 875100

Change-Id: I712df6272135b1fa3b1f32095916b18128644718
Reviewed-on: https://chromium-review.googlesource.com/1179078Reviewed-by: Vadim Shtayura <vadimsh@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

gsutil.vpython

@@ -100,3 +100,19 @@ wheel: <
 ##
 # END "cryptography" dependencies.
 ##
+
+wheel: <
+  name: "infra/python/wheels/crcmod/${vpython_platform}"
+  version: "version:1.7"
+  match_tag: <
+    abi: "cp27mu"
+    platform: "manylinux1_i686"
+  >
+  match_tag: <
+    abi: "cp27mu"
+    platform: "manylinux1_x86_64"
+  >
+  match_tag: <
+    platform: "macosx_10_6_intel"
+  >
+>