Update to kernel headers v5.3.2.

Test: Builds and run unit tests on taimen/cuttlefish.
Change-Id: I6ebd8f179d159ac974555e8edca588083e8081b3
diff --git a/libc/kernel/uapi/linux/isdn/capicmd.h b/libc/kernel/uapi/linux/isdn/capicmd.h
index d6ce6ed..419b278 100644
--- a/libc/kernel/uapi/linux/isdn/capicmd.h
+++ b/libc/kernel/uapi/linux/isdn/capicmd.h
@@ -21,6 +21,7 @@
 #define CAPI_MSG_BASELEN 8
 #define CAPI_DATA_B3_REQ_LEN (CAPI_MSG_BASELEN + 4 + 4 + 2 + 2 + 2)
 #define CAPI_DATA_B3_RESP_LEN (CAPI_MSG_BASELEN + 4 + 2)
+#define CAPI_DISCONNECT_B3_RESP_LEN (CAPI_MSG_BASELEN + 4)
 #define CAPI_ALERT 0x01
 #define CAPI_CONNECT 0x02
 #define CAPI_CONNECT_ACTIVE 0x03