rust: use std::os::raw instead of core::ffi

core::ffi::c_* types were introduced in Rust 1.64.0.  Use the older types
in std::os::raw, which are now aliases of the types in core::ffi.  There is
no need to compile QEMU as no_std, so this is acceptable as long as we support
a version of Debian with Rust 1.63.0.

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

meson.build

@@ -3953,14 +3953,13 @@ if have_rust and have_system
   bindgen_args = [
     '--disable-header-comment',
     '--raw-line', '// @generated',
-    '--ctypes-prefix', 'core::ffi',
+    '--ctypes-prefix', 'std::os::raw',
     '--formatter', 'rustfmt',
     '--generate-block',
     '--generate-cstr',
     '--impl-debug',
     '--merge-extern-blocks',
     '--no-doc-comments',
-    '--use-core',
     '--with-derive-default',
     '--no-layout-tests',
     '--no-prepend-enum-name',