This is needed in order to remove math.{min,max} from std in favour of
the builtins, since the builtins need the behavior fix from the previous
commit.
Note from Andrew: I updated this commit with zig1.wasm built by me.
Signed-off-by: Andrew Kelley <andrew@ziglang.org>
This is needed because bug fixes to the C backend are required in order
to actually update the standard library and compiler sources to use the
new `@memcpy` and `@memset` semantics.
This requires manual defines before C99 which may not have stdint.h.
Also have update-zig1 leave a copy of lib/zig.h in stage1/zig.h, which
allows lib/zig.h to be updated without needing to update zig1.wasm.
Note that since the object already existed with the exact same contents,
this completely avoids repo bloat due to zig.h changes.
