account for HAVE_FSEVENTS being defined via watchman_system.h

Summary: as dtolnay pointed out on D80902289, its possible for HAVE_FSEVENTS to be defined in `watchman/watchman_cmd.h` - so move that above the directive.

Reviewed By: MichaelCuevas

Differential Revision: D80910787

fbshipit-source-id: 506b7e54c4117009b85ae569016efd9501d9e500

Author: genevievehelsel

watchman/watcher/fsevents.cpp

@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#include "watchman/watchman_cmd.h" // @donotremove
+
 #if HAVE_FSEVENTS
 
 #include <folly/String.h>
@@ -19,7 +21,6 @@
 #include "watchman/LogConfig.h"
 #include "watchman/fs/Pipe.h"
 #include "watchman/watcher/WatcherRegistry.h"
-#include "watchman/watchman_cmd.h"
 
 #include "watchman/watcher/fsevents.h"
 

watchman/watcher/kqueue_and_fsevents.cpp

@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#include "watchman/watchman_cmd.h" // @donotremove
+
 #if HAVE_FSEVENTS && defined(HAVE_KQUEUE)
 
 #include <folly/Synchronized.h>
@@ -16,7 +18,6 @@
 #include "watchman/watcher/WatcherRegistry.h"
 #include "watchman/watcher/fsevents.h"
 #include "watchman/watcher/kqueue.h"
-#include "watchman/watchman_cmd.h"
 #include "watchman/watchman_file.h"
 
 namespace watchman {