add #include <errno.h> so it can be compiled in linux
add #include <errno.h> so it can be compiled in linux

mklight/eCMD,open-power/eCMD,mklight/eCMD,mklight/eCMD,mklight/eCMD,open-power/eCMD,open-power/eCMD,open-power/eCMD,open-power/eCMD,mklight/eCMD