[toolchain-utils] Increase timeout for tryjobs.

Toolchain trybob images are taking longer to build and
causing performance jobsto hit a timout limit.
This CL increases the timeout limit to 12 hours.

BUG=chromium:925534
TEST=None

Change-Id: Icbb8c56d70f135a574a7176b2f3b5dd5c4504710
Reviewed-on: https://chromium-review.googlesource.com/c/1436497
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Caroline Tice <cmtice@chromium.org>
diff --git a/cros_utils/buildbot_utils.py b/cros_utils/buildbot_utils.py
index bfc048e..0d93765 100644
--- a/cros_utils/buildbot_utils.py
+++ b/cros_utils/buildbot_utils.py
@@ -18,8 +18,8 @@
 SLEEP_TIME = 600  # 10 minutes; time between polling of buildbot.
 
 # Some of our slower builders (llvm-next) are taking more
-# than 8 hours. So, increase this TIME_OUT to 10.5 hours.
-TIME_OUT = 37800  # Decide the build is dead or will never finish
+# than 11 hours. So, increase this TIME_OUT to 12 hours.
+TIME_OUT = 43200  # Decide the build is dead or will never finish
 
 
 class BuildbotTimeout(Exception):