Missing gpio-keys.kl on my pandaboard

Hi, I'm using "lunch pandaboard-eng" to build image for my pandaboard. I have added some entries to device/ti/panda/gpio-keys.kl for my develop board. I expect the build system will install it to system/usr/keylayout/gpio-keys.kl. However, I found that gpio-keys.kl is not installed in system/usr/keylayout on my develop board. It seems every file list in PRODUCT_COPY_FILES are coped to the device except the gpio-keys.kl file. Any idea to make the build system to add gpio-keys.kl to the device.

BTW, I'm confused about the device/ti/panda and device/linaro/pandaboard folders. It seems my build uses device/ti/panda. What is device/linaro/pandaboard for?

Thanks, Axel