Update to v4.20.1 kernel headers.

This includes one manual change:

In the file bionic/libc/kernel/uapi/linux/in.h, the macro IN_BADCLASS
was not definied correctly. Change the macro from:

  #define IN_BADCLASS(a) ((((long int) (a)) == 0xffffffff)

to:

  #define IN_BADCLASS(a) (((long int) (a)) == (long int)0xffffffff)

This change is being pushed to the upstream kernels.

Test: Builds and boots.
Change-Id: Ia304773a9dc6789b34d9769d73742384d6afb571
Merged-In: Ia304773a9dc6789b34d9769d73742384d6afb571
(cherry picked from commit 967fb01cce73591281e7804e2c0fa9f83b618f5b)
diff --git a/libc/kernel/uapi/linux/input-event-codes.h b/libc/kernel/uapi/linux/input-event-codes.h
index d8ae4c8..11e6d5b 100644
--- a/libc/kernel/uapi/linux/input-event-codes.h
+++ b/libc/kernel/uapi/linux/input-event-codes.h
@@ -622,6 +622,7 @@
 #define REL_DIAL 0x07
 #define REL_WHEEL 0x08
 #define REL_MISC 0x09
+#define REL_RESERVED 0x0a
 #define REL_MAX 0x0f
 #define REL_CNT (REL_MAX + 1)
 #define ABS_X 0x00
@@ -650,6 +651,7 @@
 #define ABS_TOOL_WIDTH 0x1c
 #define ABS_VOLUME 0x20
 #define ABS_MISC 0x28
+#define ABS_RESERVED 0x2e
 #define ABS_MT_SLOT 0x2f
 #define ABS_MT_TOUCH_MAJOR 0x30
 #define ABS_MT_TOUCH_MINOR 0x31