Add CMake support for copying device specific Halide runtime headers to common include directory.
Add CMake support for copying device specific Halide runtime headers
to common include directory.


Former-commit-id: 9c139a083e0f21a8c725111580d34039bf3eda75
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide