[CMake] Revise travis build script following cmake change.
[CMake] Revise travis build script following cmake change.


Former-commit-id: f661df3facbb3b65076b1d52ba4cfe132564c472
darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide