genx: fix typo in add_cmc_target
genx: fix typo in add_cmc_target

This will lead to shaders build failure if add_cmc_target will be used
outside of foreach(platform ...) loop.

Signed-off-by: Dmitry Rogozhkin <01f0df9cc32cbf6a7f0faa5c8376e6cf28354d70@intel.com>

Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK