fixed preprocessor guard in TestRadixSortVariableBits test
fixed preprocessor guard in TestRadixSortVariableBits test

levendlee/thrust,rdmenezes/thrust,rdmenezes/thrust,levendlee/thrust,allendaicool/thrust,allendaicool/thrust,Vishwa07/thrust,levendlee/thrust,rdmenezes/thrust,Vishwa07/thrust,bfurtaw/thrust,UIKit0/thrust,UIKit0/thrust,UIKit0/thrust,levendlee/thrust,lishi0927/thrust,h1arshad/thrust,julianromera/thrust,hemmingway/thrust,google-code-export/thrust,malenie/thrust,bfurtaw/thrust,google-code-export/thrust,lishi0927/thrust,malenie/thrust,google-code-export/thrust,julianromera/thrust,lishi0927/thrust,Vishwa07/thrust,h1arshad/thrust,h1arshad/thrust,julianromera/thrust,rdmenezes/thrust,bfurtaw/thrust,julianromera/thrust,google-code-export/thrust,hemmingway/thrust,malenie/thrust,Vishwa07/thrust,bfurtaw/thrust,allendaicool/thrust,malenie/thrust,hemmingway/thrust,hemmingway/thrust,allendaicool/thrust,lishi0927/thrust,h1arshad/thrust,UIKit0/thrust