Update to v4.17.3 kernel headers.

Test: Builds, boots on a walleye.
Change-Id: I389d8b61ec00ea309e38d1b1a2e0dace48c21edb
diff --git a/libc/kernel/uapi/linux/lirc.h b/libc/kernel/uapi/linux/lirc.h
index d7dfa76..3dfb6d0 100644
--- a/libc/kernel/uapi/linux/lirc.h
+++ b/libc/kernel/uapi/linux/lirc.h
@@ -46,6 +46,7 @@
 #define LIRC_MODE_RAW 0x00000001
 #define LIRC_MODE_PULSE 0x00000002
 #define LIRC_MODE_MODE2 0x00000004
+#define LIRC_MODE_SCANCODE 0x00000008
 #define LIRC_MODE_LIRCCODE 0x00000010
 #define LIRC_CAN_SEND_RAW LIRC_MODE2SEND(LIRC_MODE_RAW)
 #define LIRC_CAN_SEND_PULSE LIRC_MODE2SEND(LIRC_MODE_PULSE)
@@ -58,6 +59,7 @@
 #define LIRC_CAN_REC_RAW LIRC_MODE2REC(LIRC_MODE_RAW)
 #define LIRC_CAN_REC_PULSE LIRC_MODE2REC(LIRC_MODE_PULSE)
 #define LIRC_CAN_REC_MODE2 LIRC_MODE2REC(LIRC_MODE_MODE2)
+#define LIRC_CAN_REC_SCANCODE LIRC_MODE2REC(LIRC_MODE_SCANCODE)
 #define LIRC_CAN_REC_LIRCCODE LIRC_MODE2REC(LIRC_MODE_LIRCCODE)
 #define LIRC_CAN_REC_MASK LIRC_MODE2REC(LIRC_CAN_SEND_MASK)
 #define LIRC_CAN_SET_REC_CARRIER (LIRC_CAN_SET_SEND_CARRIER << 16)
@@ -90,4 +92,39 @@
 #define LIRC_SET_MEASURE_CARRIER_MODE _IOW('i', 0x0000001d, __u32)
 #define LIRC_SET_REC_CARRIER_RANGE _IOW('i', 0x0000001f, __u32)
 #define LIRC_SET_WIDEBAND_RECEIVER _IOW('i', 0x00000023, __u32)
+struct lirc_scancode {
+  __u64 timestamp;
+  __u16 flags;
+  __u16 rc_proto;
+  __u32 keycode;
+  __u64 scancode;
+};
+#define LIRC_SCANCODE_FLAG_TOGGLE 1
+#define LIRC_SCANCODE_FLAG_REPEAT 2
+enum rc_proto {
+  RC_PROTO_UNKNOWN = 0,
+  RC_PROTO_OTHER = 1,
+  RC_PROTO_RC5 = 2,
+  RC_PROTO_RC5X_20 = 3,
+  RC_PROTO_RC5_SZ = 4,
+  RC_PROTO_JVC = 5,
+  RC_PROTO_SONY12 = 6,
+  RC_PROTO_SONY15 = 7,
+  RC_PROTO_SONY20 = 8,
+  RC_PROTO_NEC = 9,
+  RC_PROTO_NECX = 10,
+  RC_PROTO_NEC32 = 11,
+  RC_PROTO_SANYO = 12,
+  RC_PROTO_MCIR2_KBD = 13,
+  RC_PROTO_MCIR2_MSE = 14,
+  RC_PROTO_RC6_0 = 15,
+  RC_PROTO_RC6_6A_20 = 16,
+  RC_PROTO_RC6_6A_24 = 17,
+  RC_PROTO_RC6_6A_32 = 18,
+  RC_PROTO_RC6_MCE = 19,
+  RC_PROTO_SHARP = 20,
+  RC_PROTO_XMP = 21,
+  RC_PROTO_CEC = 22,
+  RC_PROTO_IMON = 23,
+};
 #endif