Update to v5.14 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.14

Test: Builds, bionic unit tests.
Change-Id: Iff3424da9fbf7ae89ebeb6daabb34c4aa650901f
diff --git a/libc/kernel/uapi/linux/io_uring.h b/libc/kernel/uapi/linux/io_uring.h
index f26751e..622f772 100644
--- a/libc/kernel/uapi/linux/io_uring.h
+++ b/libc/kernel/uapi/linux/io_uring.h
@@ -53,16 +53,12 @@
   };
   __u64 user_data;
   union {
-    struct {
-      union {
-        __u16 buf_index;
-        __u16 buf_group;
-      } __attribute__((packed));
-      __u16 personality;
-      __s32 splice_fd_in;
-    };
-    __u64 __pad2[3];
-  };
+    __u16 buf_index;
+    __u16 buf_group;
+  } __attribute__((packed));
+  __u16 personality;
+  __s32 splice_fd_in;
+  __u64 __pad2[2];
 };
 enum {
   IOSQE_FIXED_FILE_BIT,
@@ -215,6 +211,8 @@
   IORING_REGISTER_FILES_UPDATE2 = 14,
   IORING_REGISTER_BUFFERS2 = 15,
   IORING_REGISTER_BUFFERS_UPDATE = 16,
+  IORING_REGISTER_IOWQ_AFF = 17,
+  IORING_UNREGISTER_IOWQ_AFF = 18,
   IORING_REGISTER_LAST
 };
 struct io_uring_files_update {