Add a "CrWinClang Tester" test list.

Add a "CrWinClang Tester" test list.

In preparation of moving the clang/win bots to recipes.

This list is intended to match win_clang_tests in
masters/master.chromium.fyi/master.cfg

BUG=446368
R=jochen@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/ebe8d36af2d8b3a0247fa13dd022ec15f203cba5

[Nico, 2015-01-14 04:33:20]

thakis@chromium.org changed reviewers:
+ jochen@chromium.org

[Nico, 2015-01-14 04:33:20]

See also https://codereview.chromium.org/829363004/ , which will use this.

If this works, I'll want to move the other CrWinClang bots on
http://build.chromium.org/p/chromium.fyi/console?category=win%20clang too – do I
really have to repeat this test list 8 times?

[jochen (gone - plz use gerrit), 2015-01-14 13:22:11]

lgtm

[commit-bot: I haz the power, 2015-01-14 16:51:11]

Patchset 1 (id:??) landed as
https://crrev.com/ebe8d36af2d8b3a0247fa13dd022ec15f203cba5
Cr-Commit-Position: refs/heads/master@{#311493}

[Nico, 2015-01-14 16:51:18]

Committed patchset #1 (id:1) manually as
ebe8d36af2d8b3a0247fa13dd022ec15f203cba5 (presubmit successful).