Update kernel headers to v3.18.3.

Bug: 19127803
Change-Id: I67fa0832322ddd0032d909476047578be052bcf2
diff --git a/libc/kernel/uapi/linux/bsg.h b/libc/kernel/uapi/linux/bsg.h
index a4df52a..8f59448 100644
--- a/libc/kernel/uapi/linux/bsg.h
+++ b/libc/kernel/uapi/linux/bsg.h
@@ -26,48 +26,49 @@
 #define BSG_SUB_PROTOCOL_SCSI_TRANSPORT 2
 #define BSG_FLAG_Q_AT_TAIL 0x10
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BSG_FLAG_Q_AT_HEAD 0x20
 struct sg_io_v4 {
  __s32 guard;
  __u32 protocol;
- __u32 subprotocol;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 subprotocol;
  __u32 request_len;
  __u64 request;
  __u64 request_tag;
- __u32 request_attr;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 request_attr;
  __u32 request_priority;
  __u32 request_extra;
  __u32 max_response_len;
- __u64 response;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u64 response;
  __u32 dout_iovec_count;
  __u32 dout_xfer_len;
  __u32 din_iovec_count;
- __u32 din_xfer_len;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 din_xfer_len;
  __u64 dout_xferp;
  __u64 din_xferp;
  __u32 timeout;
- __u32 flags;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 flags;
  __u64 usr_ptr;
  __u32 spare_in;
  __u32 driver_status;
- __u32 transport_status;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 transport_status;
  __u32 device_status;
  __u32 retry_delay;
  __u32 info;
- __u32 duration;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 duration;
  __u32 response_len;
  __s32 din_resid;
  __s32 dout_resid;
- __u64 generated_tag;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u64 generated_tag;
  __u32 spare_out;
  __u32 padding;
 };
-#endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif