toolchain: Add kahlee board to nightly llvm tests.

Kahlee is a new board using AMD stoney ridge platform.

BUG=None
TEST=Kahlee-llvm-toolchain-tryjob job is created.

Change-Id: I2c04c482d63ba2bc1cb79ded4402a69618b4f2dc
Reviewed-on: https://chromium-review.googlesource.com/869171
Commit-Ready: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Luis Lozano <llozano@chromium.org>
1 file changed