Fix build, mostly

build.rs

src/header/_template/mod.rs

src/header/dirent/mod.rs

src/header/fcntl/mod.rs

src/header/inttypes/mod.rs

src/header/signal/mod.rs

src/header/stdio/helpers.rs

src/header/stdio/mod.rs

src/header/stdio/printf.rs

src/header/stdio/scanf.rs

src/header/stdlib/mod.rs

src/header/sys_file/mod.rs

src/header/sys_ioctl/mod.rs

src/header/sys_mman/mod.rs

src/header/sys_socket/mod.rs

src/header/sys_utsname/mod.rs

src/header/time/constants.rs

src/header/time/helpers.rs

src/header/time/mod.rs

src/header/time/strftime.rs