halide_add_generator_dependency() is broken
halide_add_generator_dependency() is broken

It does ‘ar q’ every build, so multiple builds with clean produce an
archive with multiple object files embedded, making for suboptimal
debugging.

Hack fix is to just rm it each time. (There’s probably a better flag to
ar.)


Former-commit-id: fb004653834ee0ea05787d2d0320d5ab8ec0c924
darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide