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
Merged-In: I57387d3c31e0ba5ad125ffe291cecf365c7b374e
diff --git a/libc/kernel/uapi/linux/input.h b/libc/kernel/uapi/linux/input.h
index f138f64..fe17226 100644
--- a/libc/kernel/uapi/linux/input.h
+++ b/libc/kernel/uapi/linux/input.h
@@ -32,6 +32,7 @@
   __kernel_ulong_t __sec;
 #if defined(__sparc__) && defined(__arch64__)
   unsigned int __usec;
+  unsigned int __pad;
 #else
   __kernel_ulong_t __usec;
 #endif