@update
> CMakeLists.txt
| remove the generation of the shared version of the fxlibc (deprecated, unused)
> include/errno
| add some error macros needed in vhex
> src/string/strerror
| add EINTR support
| add EAGAIN support
| add ENOMEDIUM support
| add EMEDIUMTYPE support
@fix
> include/target/vhex
| add missing headers