Revert of CQ: Disable win_x64_clang_dbg trybot (patchset #1 id:1 of https://codereview.webrtc.org/1850113002/ )
Revert of CQ: Disable win_x64_clang_dbg trybot (patchset #1 id:1 of https://codereview.webrtc.org/1850113002/ )

Reason for revert:
I think the bug has been making enough progress for us to turn this back on (Chrome turned on their trybot).
I fired of builds and now have 6 green ones in a row.

Original issue's description:
> CQ: Disable win_x64_clang_dbg trybot
>
> Needed to unblock rolling chromium_revision in WebRTC DEPS.
>
> BUG=chromium:595702
> TBR=phoglund@webrtc.org
>
> Committed: https://chromium.googlesource.com/external/webrtc/+/053fe8c6b14cb81880e37f9af3ea4fbde99e45fb

TBR=phoglund@webrtc.org
NOTRY=True
BUG=chromium:595702

Review URL: https://codereview.webrtc.org/1897743002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#12399}

TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc