New test for groupprivate 6.0

[rjenaa]

No description provided.

[spophale]

@seyonglee , @rjenaa Our usage is correct. Only thing is that the pragma needs to go right after the declaration. To keep it simple, lets get rid of the nohost. That is an unnecessary level of complication.

[spophale]

@jrreap next steps:
Same test + device_type(any) -- no other change required
Same test + device_type(host) -- remove target directive
Same test + device_type(nohost) -- function should also be declared noohost