Update to v5.11 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.11

Test: Built cuttlefish and flame images. Ran bionic unit tests on both.
Change-Id: Ie60337aafad4bda55af99b6c8fe9f56bf2fa787f
diff --git a/libc/kernel/uapi/asm-generic/socket.h b/libc/kernel/uapi/asm-generic/socket.h
index 11557aa..7372be8 100644
--- a/libc/kernel/uapi/asm-generic/socket.h
+++ b/libc/kernel/uapi/asm-generic/socket.h
@@ -95,6 +95,8 @@
 #define SO_RCVTIMEO_NEW 66
 #define SO_SNDTIMEO_NEW 67
 #define SO_DETACH_REUSEPORT_BPF 68
+#define SO_PREFER_BUSY_POLL 69
+#define SO_BUSY_POLL_BUDGET 70
 #if __BITS_PER_LONG == 64 || defined(__x86_64__) && defined(__ILP32__)
 #define SO_TIMESTAMP SO_TIMESTAMP_OLD
 #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD