build.config: inherit build.config.common and release ko files

inherit build.config.common to use the same settings for toolchain,
also set IN_KERNEL_MODULES to have the ko files in distribution

Test: BUILD_CONFIG=omap/build.config ./build/build.sh

Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
Change-Id: I08aa9c882b08fd2e9de32572a717130873734512
1 file changed