core.sys.posix.fcntl: Add correct locking constants for Glibc/AArch64

Author: joakim-noah

src/core/sys/posix/fcntl.d

@@ -98,6 +98,12 @@ version( CRuntime_Glibc )
     enum F_SETLK        = 6;
     enum F_SETLKW       = 7;
   }
+  else version(AArch64)
+  {
+    enum F_GETLK        = 5;
+    enum F_SETLK        = 6;
+    enum F_SETLKW       = 7;
+  }
   else
   static if( __USE_FILE_OFFSET64 )
   {