Update kernel headers to v3.18.3.

Bug: 19127803
Change-Id: I67fa0832322ddd0032d909476047578be052bcf2
diff --git a/libc/kernel/uapi/linux/kexec.h b/libc/kernel/uapi/linux/kexec.h
index a17dc23..a3f0db2 100644
--- a/libc/kernel/uapi/linux/kexec.h
+++ b/libc/kernel/uapi/linux/kexec.h
@@ -23,28 +23,32 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KEXEC_PRESERVE_CONTEXT 0x00000002
 #define KEXEC_ARCH_MASK 0xffff0000
+#define KEXEC_FILE_UNLOAD 0x00000001
+#define KEXEC_FILE_ON_CRASH 0x00000002
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define KEXEC_FILE_NO_INITRAMFS 0x00000004
 #define KEXEC_ARCH_DEFAULT ( 0 << 16)
 #define KEXEC_ARCH_386 ( 3 << 16)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KEXEC_ARCH_68K ( 4 << 16)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KEXEC_ARCH_X86_64 (62 << 16)
 #define KEXEC_ARCH_PPC (20 << 16)
 #define KEXEC_ARCH_PPC64 (21 << 16)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KEXEC_ARCH_IA_64 (50 << 16)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KEXEC_ARCH_ARM (40 << 16)
 #define KEXEC_ARCH_S390 (22 << 16)
 #define KEXEC_ARCH_SH (42 << 16)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KEXEC_ARCH_MIPS_LE (10 << 16)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KEXEC_ARCH_MIPS ( 8 << 16)
 #define KEXEC_SEGMENT_MAX 16
 struct kexec_segment {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  const void *buf;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  size_t bufsz;
  const void *mem;
  size_t memsz;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif