More verbose post install script. Fix failures due to grep not found
More verbose post install script. Fix failures due to grep not found

shehzan10/arrayfire,shehzan10/arrayfire,9prady9/arrayfire,9prady9/arrayfire,munnybearz/arrayfire,umar456/arrayfire,munnybearz/arrayfire,shehzan10/arrayfire,arrayfire/arrayfire,9prady9/arrayfire,9prady9/arrayfire,umar456/arrayfire,arrayfire/arrayfire,umar456/arrayfire,arrayfire/arrayfire,arrayfire/arrayfire,shehzan10/arrayfire,umar456/arrayfire,munnybearz/arrayfire