Update kernel uapi headers to v3.16.1.

Other changes to support the new headers:

- Remove the flock64 structure it is defined in the new headers.
- Update the syscalls to correspond with the headers.

Change-Id: I49a6b07e8b2bfffb67be71b07b58e4e6848fcc09
diff --git a/libc/kernel/uapi/asm-x86/asm/unistd_32.h b/libc/kernel/uapi/asm-x86/asm/unistd_32.h
index 4838ae1..5102e56 100644
--- a/libc/kernel/uapi/asm-x86/asm/unistd_32.h
+++ b/libc/kernel/uapi/asm-x86/asm/unistd_32.h
@@ -454,5 +454,6 @@
 #define __NR_finit_module 350
 #define __NR_sched_setattr 351
 #define __NR_sched_getattr 352
-#endif
+#define __NR_renameat2 353
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif