redox native fixes for unused_must_use

src/header/unistd/sysconf/redox.rs

@@ -97,7 +97,7 @@ pub fn get_mem_stat() -> Result<sys_statvfs::statvfs, Errno> {
     let fd = Sys::open(c"/scheme/memory".into(), fcntl::O_PATH, 0)?;
     let mut buf = sys_statvfs::statvfs::default();
     let res = Sys::fstatvfs(fd, Out::from_mut(&mut buf));
-    Sys::close(fd);
+    if let Ok(()) = Sys::close(fd) {}; // TODO handle error
     let _ = res?;
     return Ok(buf);
 }

src/platform/redox/ptrace.rs

@@ -167,7 +167,7 @@ unsafe fn inner_ptrace(
         | sys_ptrace::PTRACE_SYSCALL
         | sys_ptrace::PTRACE_SYSEMU
         | sys_ptrace::PTRACE_SYSEMU_SINGLESTEP => {
-            Sys::kill(pid, signal::SIGCONT as _);
+            if let Ok(()) = Sys::kill(pid, signal::SIGCONT as _) {}; // TODO handle error
 
             // TODO: Translate errors
             let syscall = syscall::PTRACE_STOP_PRE_SYSCALL | syscall::PTRACE_STOP_POST_SYSCALL;