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/linux/close_range.h b/libc/kernel/uapi/linux/close_range.h
index de4135e..279e4bb 100644
--- a/libc/kernel/uapi/linux/close_range.h
+++ b/libc/kernel/uapi/linux/close_range.h
@@ -19,4 +19,5 @@
 #ifndef _UAPI_LINUX_CLOSE_RANGE_H
 #define _UAPI_LINUX_CLOSE_RANGE_H
 #define CLOSE_RANGE_UNSHARE (1U << 1)
+#define CLOSE_RANGE_CLOEXEC (1U << 2)
 #endif