provide useless 64-bit fcntl macros with _LARGEFILE64_SOURCE

this is all useless but part of the API, which is part of the
_GNU_SOURCE API, so something may need them.

include/fcntl.h

@@ -154,6 +154,9 @@ ssize_t tee(int, int, size_t, unsigned);
 #endif
 
 #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
+#define F_GETLK64 F_GETLK
+#define F_SETLK64 F_SETLK
+#define F_SETLKW64 F_SETLKW
 #define open64 open
 #define openat64 openat
 #define creat64 creat