dbuild: Trim white-space from hostname
dbuild: Trim white-space from hostname

A username of github is used for hostname.
Trim white-space from hostname for a case with spaces in the username.

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