Update to v5.5 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.5

Test: Boots on walleye.
Test: Ran bionic-unit-tests on walleye.
Test: Boots on cuttlefish.
Test: Ran bionic-unit-tests on cuttlefish.
Change-Id: I57387d3c31e0ba5ad125ffe291cecf365c7b374e
diff --git a/libc/kernel/uapi/asm-generic/msgbuf.h b/libc/kernel/uapi/asm-generic/msgbuf.h
index a8af16e..827d050 100644
--- a/libc/kernel/uapi/asm-generic/msgbuf.h
+++ b/libc/kernel/uapi/asm-generic/msgbuf.h
@@ -19,12 +19,13 @@
 #ifndef __ASM_GENERIC_MSGBUF_H
 #define __ASM_GENERIC_MSGBUF_H
 #include <asm/bitsperlong.h>
+#include <asm/ipcbuf.h>
 struct msqid64_ds {
   struct ipc64_perm msg_perm;
 #if __BITS_PER_LONG == 64
-  __kernel_time_t msg_stime;
-  __kernel_time_t msg_rtime;
-  __kernel_time_t msg_ctime;
+  long msg_stime;
+  long msg_rtime;
+  long msg_ctime;
 #else
   unsigned long msg_stime;
   unsigned long msg_stime_high;