Fix GETRANDOM constant on x86, mixed up with x86_64

Author: tbu-

src/platform/linux-x86/nr.rs

@@ -96,7 +96,7 @@ pub const GETPGRP: usize = 65;
 pub const GETPID: usize = 20;
 pub const GETPPID: usize = 64;
 pub const GETPRIORITY: usize = 96;
-pub const GETRANDOM: usize = 318;
+pub const GETRANDOM: usize = 355;
 pub const GETRESGID: usize = 171;
 pub const GETRESGID32: usize = 211;
 pub const GETRESUID: usize = 165;