fs/ftruncate : set errno as EINVAL if length is negative
fs/ftruncate : set errno as EINVAL if length is negative

It is Same as posix, change to set EINVAL as a errno

sunghan-chang/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,jsdosa/TizenRT,pillip8282/TizenRT,sunghan-chang/TizenRT,jeongarmy/TizenRT,an4967/TizenRT,an4967/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,Samsung/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT,pillip8282/TizenRT,jsdosa/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,junmin-kim/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,jeongarmy/TizenRT,jeongarmy/TizenRT,Samsung/TizenRT,junmin-kim/TizenRT,jeongarmy/TizenRT,an4967/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,an4967/TizenRT,jsdosa/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,Samsung/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,jsdosa/TizenRT,jeongarmy/TizenRT,jeongarmy/TizenRT