std.cache_hash: temporary workaround for mtime precision on linux
std.cache_hash: temporary workaround for mtime precision on linux

See #6082

raulgrell/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,zig-lang/zig,raulgrell/zig,andrewrk/zig,zig-lang/zig,raulgrell/zig,andrewrk/zig