x86: fix incomplete include guard in include/asm-x86/seccomp_32.h

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/seccomp_32.h b/include/asm-x86/seccomp_32.h
index 18da19e..36e71c5 100644
--- a/include/asm-x86/seccomp_32.h
+++ b/include/asm-x86/seccomp_32.h
@@ -1,4 +1,5 @@
 #ifndef _ASM_SECCOMP_H
+#define _ASM_SECCOMP_H
 
 #include <linux/thread_info.h>