devices: cannot find function `statx` in crate `libc`

[peppergrayxyz]

Build fails on llvm/musl/libcxx (#429)

musl 1.2.5 added support for the statx system call & rust ships unknown-linux-musl with musl 1.2.3 therefore statx doesn't exist

   Compiling devices v0.1.0 (/home/pepper/dev/ghrepos/libkrun/src/devices)
error: couldn't read `src/devices/src/virtio/fs/linux/../../../../../../init/init`: No such file or directory (os error 2)
  --> src/devices/src/virtio/fs/linux/passthrough.rs:36:29
   |
36 | static INIT_BINARY: &[u8] = include_bytes!("../../../../../../init/init");
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0412]: cannot find type `statx` in crate `libc`
   --> src/devices/src/virtio/fs/linux/passthrough.rs:150:39
    |
150 |       let mut stx = MaybeUninit::<libc::statx>::zeroed();
    |                                         ^^^^^ help: a struct with a similar name exists: `stat`
    |
   ::: /home/pepper/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/libc-0.2.172/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs:10:1
    |
10  | / s! {
11  | |     pub struct stat {
12  | |         pub st_dev: crate::dev_t,
13  | |         pub st_ino: crate::ino_t,
...   |
112 | | }
    | |_- similarly named struct `stat` defined here

error[E0425]: cannot find function `statx` in crate `libc`
   --> src/devices/src/virtio/fs/linux/passthrough.rs:158:15
    |
158 |         libc::statx(                                                                                                      |               ^^^^^ help: a function with a similar name exists: `stat`
    |
   ::: /home/pepper/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/libc-0.2.172/src/unix/mod.rs:876:5
    |
876 |     pub fn stat(path: *const c_char, buf: *mut stat) -> c_int;
    |     ---------------------------------------------------------- similarly named function `stat` defined here
                                                                                                                            error[E0425]: cannot find value `STATX_BASIC_STATS` in crate `libc`
   --> src/devices/src/virtio/fs/linux/passthrough.rs:162:19
    |
162 |             libc::STATX_BASIC_STATS | libc::STATX_MNT_ID,
    |                   ^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `STATX_MNT_ID` in crate `libc`
   --> src/devices/src/virtio/fs/linux/passthrough.rs:162:45
    |
162 |             libc::STATX_BASIC_STATS | libc::STATX_MNT_ID,
    |                                             ^^^^^^^^^^^^ not found in `libc`