Fix missing cpio
./kernel/gen_kheaders.sh: line 77: cpio: command not found make[1]: *** [kernel/Makefile:132: kernel/kheaders_data.tar.xz] Error 127 make: *** [Makefile:1071: kernel] Error 2 make: *** Waiting for unfinished jobs....
./kernel/gen_kheaders.sh: line 77: cpio: command not found make[1]: *** [kernel/Makefile:132: kernel/kheaders_data.tar.xz] Error 127 make: *** [Makefile:1071: kernel] Error 2 make: *** Waiting for unfinished jobs....