Update to kernel headers v5.2.

Test: Booted a taimen, ran unit bionic unit tests.
Change-Id: I3522c59793bbcef98ea515996a481d92f14b8816
diff --git a/libc/kernel/uapi/linux/input-event-codes.h b/libc/kernel/uapi/linux/input-event-codes.h
index 7bbb234..5d20c24 100644
--- a/libc/kernel/uapi/linux/input-event-codes.h
+++ b/libc/kernel/uapi/linux/input-event-codes.h
@@ -543,6 +543,7 @@
 #define KEY_SCREENSAVER 0x245
 #define KEY_VOICECOMMAND 0x246
 #define KEY_ASSISTANT 0x247
+#define KEY_KBD_LAYOUT_NEXT 0x248
 #define KEY_BRIGHTNESS_MIN 0x250
 #define KEY_BRIGHTNESS_MAX 0x251
 #define KEY_KBDINPUTASSIST_PREV 0x260