benchmark ccminer for CcminerTpruvot and CcminerNanashi need to rung longer 
The benchmark is to short for Ccminer in most cases. 


![image](https://user-images.githubusercontent.com/19214485/38369513-26971d1a-38e8-11e8-8e96-ed62a1fa4d80.png)

If I run it for 5 minits i get +1000Kh/s