Merge branch 'fix_arm64' into 'master'

Fix building for arm64

See merge request redox-os/relibc!636

src/platform/redox/socket.rs

@@ -143,7 +143,7 @@ unsafe fn inner_af_inet(
 
     let mut addr = in_addr::default();
     assert_eq!(
-        inet_aton(raw_addr.as_ptr() as *mut i8, &mut addr),
+        inet_aton(raw_addr.as_ptr() as *mut c_char, &mut addr),
         1,
         "inet_aton might be broken, failed to parse netstack address"
     );

src/platform/types.rs

@@ -42,7 +42,7 @@ pub type intptr_t = isize;
 pub type uintptr_t = usize;
 pub type ssize_t = isize;
 
-pub type c_char = i8;
+pub type c_char = core::ffi::c_char;
 #[cfg(target_pointer_width = "32")]
 pub type c_long = i32;
 #[cfg(target_pointer_width = "32")]