main/linux-grsec: fix build on x86

main/linux-grsec/APKBUILD

@@ -18,6 +18,7 @@ install=
 source="https://kernel.org/pub/linux/kernel/v4.x/linux-$_kernver.tar.xz
 	https://kernel.org/pub/linux/kernel/v4.x/patch-$pkgver.xz
 	http://dev.alpinelinux.org/~ncopa/grsec/grsecurity-3.1-4.9.9-201702122044.patch
+	pax-cmpxchg8b_emu.patch
 	config-grsec.x86
 	config-grsec.x86_64
 	config-grsec.armhf

main/linux-grsec/pax-cmpxchg8b_emu.patch

+diff --git a/arch/x86/lib/cmpxchg8b_emu.S b/arch/x86/lib/cmpxchg8b_emu.S
+index 34c859b..6793bf2 100644
+--- a/arch/x86/lib/cmpxchg8b_emu.S
++++ b/arch/x86/lib/cmpxchg8b_emu.S
+@@ -8,6 +8,7 @@
+ 
+ #include <linux/linkage.h>
+ #include <asm/export.h>
++#include <asm/alternative-asm.h>
+ 
+ .text
+