Add another `contextless`

core/sys/unix/sysctl_netbsd.odin

@@ -8,7 +8,7 @@ foreign libc {
 	@(link_name="sysctl") _unix_sysctl :: proc(name: [^]i32, namelen: u32, oldp: rawptr, oldlenp: ^c.size_t, newp: rawptr, newlen: c.size_t) -> i32 ---
 }
 
-sysctl :: proc(mib: []i32, val: ^$T) -> (ok: bool) {
+sysctl :: proc "contextless" (mib: []i32, val: ^$T) -> (ok: bool) {
 	mib := mib
 	result_size := c.size_t(size_of(T))
 	res := _unix_sysctl(raw_data(mib), u32(len(mib)), val, &result_size, nil, 0)