Revert of Update mojo sdk to rev c02a28868825edfa57ab77947b8cb15e741c5598 (patchset...

Revert of Update mojo sdk to rev c02a28868825edfa57ab77947b8cb15e741c5598 (patchset #1 id:1 of https://codereview.chromium.org/1310103002/ )

Reason for revert:
Looks like this breaks mojo_system_unittests on Android...

http://build.chromium.org/p/chromium.linux/buildstatus?builder=Android%20GN&number=29595

Original issue's description:
> Update mojo sdk to rev c02a28868825edfa57ab77947b8cb15e741c5598
>
> Re-land. Previously conflicted with another CL that landed
> just before the roll.
>
> BUG=None
> TBR=jam@chromium.org,ben@chromium.org
> TBR=mfoltz@chromium.org
> TBR=mek@chromium.org
> TBR=xhwang@chromium.org
> TBR=shess@chromium.org
>
> Committed: https://crrev.com/0bfe154baad9ddfb1f0c6ecc7cace36e8f430e75
> Cr-Commit-Position: refs/heads/master@{#344994}

TBR=ben@chromium.org,jam@chromium.org,mek@chromium.org,mfoltz@chromium.org,shess@chromium.org,xhwang@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=None

Review URL: https://codereview.chromium.org/1309103002

Cr-Commit-Position: refs/heads/master@{#344996}