openbsd: sigcontext: sc_fpstate field should be public

Author: semarie

src/unix/bsd/netbsdlike/openbsd/x86_64.rs

@@ -33,7 +33,7 @@ s! {
         pub sc_rflags: ::c_long,
         pub sc_rsp: ::c_long,
         pub sc_ss: ::c_long,
-        sc_fpstate: *mut fxsave64,
+        pub sc_fpstate: *mut fxsave64,
         __sc_unused: ::c_int,
         pub sc_mask: ::c_int,
         pub sc_cookie: ::c_long,