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/asm-generic/ioctls.h b/libc/kernel/uapi/asm-generic/ioctls.h
index 41dbce2..f8a4357 100644
--- a/libc/kernel/uapi/asm-generic/ioctls.h
+++ b/libc/kernel/uapi/asm-generic/ioctls.h
@@ -81,6 +81,8 @@
 #define TIOCGPTLCK _IOR('T', 0x39, int)
 #define TIOCGEXCL _IOR('T', 0x40, int)
 #define TIOCGPTPEER _IO('T', 0x41)
+#define TIOCGISO7816 _IOR('T', 0x42, struct serial_iso7816)
+#define TIOCSISO7816 _IOWR('T', 0x43, struct serial_iso7816)
 #define FIONCLEX 0x5450
 #define FIOCLEX 0x5451
 #define FIOASYNC 0x5452