Update to kernel headers v4.12.3.

Test: Built angler.
Change-Id: Icbcf4fac2334de8409b049ed7a3b4c24b4e98ce9
diff --git a/libc/kernel/uapi/asm-x86/asm/prctl.h b/libc/kernel/uapi/asm-x86/asm/prctl.h
index bb68f7e..0e6bed9 100644
--- a/libc/kernel/uapi/asm-x86/asm/prctl.h
+++ b/libc/kernel/uapi/asm-x86/asm/prctl.h
@@ -22,6 +22,8 @@
 #define ARCH_SET_FS 0x1002
 #define ARCH_GET_FS 0x1003
 #define ARCH_GET_GS 0x1004
+#define ARCH_GET_CPUID 0x1011
+#define ARCH_SET_CPUID 0x1012
 #define ARCH_MAP_VDSO_X32 0x2001
 #define ARCH_MAP_VDSO_32 0x2002
 #define ARCH_MAP_VDSO_64 0x2003