Tests don't pass on 9.0.1

[ilagunap]

In the Runtime.h file the following declaration causes problems:

__device__ static char *_FPC_FILE_NAME_[1];

When optimizations are applied, this global variable is lost (or optimized out), but we need to find it.

This seems to solve the problem:

__device__ const static char *_FPC_FILE_NAME_[1] = {"none"};