ohos: Don't emit duplicate lfs64 definitions

The musl module is enabled on ohos, so these are duplicates.

Author: tgross35

src/unix/linux_like/linux/mod.rs

@@ -6723,7 +6723,7 @@ extern "C" {
 //
 // * musl has 64-bit versions only so aliases the LFS64 symbols to the standard ones
 cfg_if! {
-    if #[cfg(not(target_env = "musl"))] {
+    if #[cfg(not(any(target_env = "musl", target_os = "ohos")))] {
         extern "C" {
             pub fn fallocate64(fd: c_int, mode: c_int, offset: off64_t, len: off64_t) -> c_int;
             pub fn fgetpos64(stream: *mut crate::FILE, ptr: *mut fpos64_t) -> c_int;