Add constants for ClearKey build
Add constants for ClearKey build

Signed-off-by: Zoltan Kuscsik <557cba61231509d70fbac0f1eb5a4bff058a651e@linaro.org>

linaro-home/open-content-decryption-module,kuscsik/linaro-cdm,linaro-home/open-content-decryption-module,kuscsik/linaro-cdm,kuscsik/linaro-cdm,linaro-home/open-content-decryption-module,linaro-home/open-content-decryption-module