Update to v5.16 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.16

Test: Builds and bionic unit tests pass.
Change-Id: I2522c4f2a0efb9f8a193e1f2d65868e478217502
diff --git a/libc/kernel/uapi/linux/futex.h b/libc/kernel/uapi/linux/futex.h
index aa0dac1..c80b90c 100644
--- a/libc/kernel/uapi/linux/futex.h
+++ b/libc/kernel/uapi/linux/futex.h
@@ -50,6 +50,14 @@
 #define FUTEX_WAKE_BITSET_PRIVATE (FUTEX_WAKE_BITSET | FUTEX_PRIVATE_FLAG)
 #define FUTEX_WAIT_REQUEUE_PI_PRIVATE (FUTEX_WAIT_REQUEUE_PI | FUTEX_PRIVATE_FLAG)
 #define FUTEX_CMP_REQUEUE_PI_PRIVATE (FUTEX_CMP_REQUEUE_PI | FUTEX_PRIVATE_FLAG)
+#define FUTEX_32 2
+#define FUTEX_WAITV_MAX 128
+struct futex_waitv {
+  __u64 val;
+  __u64 uaddr;
+  __u32 flags;
+  __u32 __reserved;
+};
 struct robust_list {
   struct robust_list __user * next;
 };