Rename halide_x86_cpuid -> x86_cpuid_halide
Rename halide_x86_cpuid -> x86_cpuid_halide

The “halide_” prefix was causing the name to get left in the final
output, causing lesson_15 to fail.


Former-commit-id: d9c1403faf9027ed5c1a1d952c8ab16770b32e8b
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide