Added test to verify GPU libraries are not redundantly loaded.
Added test to verify GPU libraries are not redundantly loaded.


Former-commit-id: 704869557d460169f20edacb10c5efb1a2ebc19e
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide