Fix broken path in GLES2 CTS.

Fix broken path in GLES2 CTS.

AppendSwitch was casting all directories to lower case, causing the tests
to early-out and return as always passed even before they create the test
window.

BUG=408251
Committed: https://crrev.com/62570ff8bf841529b61d542aa4d47586c80a4554
Cr-Commit-Position: refs/heads/master@{#292413}

[Jamie Madill, 2014-08-27 20:52:54]

jmadill@chromium.org changed reviewers:
+ piman@chromium.org, sievers@chromium.org

[Jamie Madill, 2014-08-27 20:53:51]

Please take a look. CC'ed Ken to keep tabs on this issue. This change will cause
some, if not all, GPU FYI bots to fail the d3d9_conform_test, as it will be
effectively switched-on.

[piman, 2014-08-27 21:02:01]

lgtm

[Ken Russell (switch to Gerrit), 2014-08-27 21:59:16]

kbr@chromium.org changed reviewers:
+ kbr@chromium.org

[Ken Russell (switch to Gerrit), 2014-08-27 21:59:16]

Thank you for catching this. LGTM too.

[Jamie Madill, 2014-08-28 13:29:04]

The CQ bit was checked by jmadill@chromium.org

[commit-bot: I haz the power, 2014-08-28 13:30:16]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jmadill@chromium.org/500133005/1

[commit-bot: I haz the power, 2014-08-28 18:19:37]

Committed patchset #1 (id:1) as 5f92c71dfe6fd66d3ddf7e89e358e71e119c2331

[commit-bot: I haz the power, 2014-09-10 03:00:34]

Patchset 1 (id:??) landed as
https://crrev.com/62570ff8bf841529b61d542aa4d47586c80a4554
Cr-Commit-Position: refs/heads/master@{#292413}