AP_Filesystem: build fixes for SITL on macOS

libraries/AP_Filesystem/AP_Filesystem_posix.cpp

@@ -20,7 +20,11 @@
 
 #if CONFIG_HAL_BOARD == HAL_BOARD_SITL || CONFIG_HAL_BOARD == HAL_BOARD_LINUX
 
+#if defined(__APPLE__)
+#include <sys/mount.h>
+#else
 #include <sys/vfs.h>
+#endif
 #include <utime.h>
 
 extern const AP_HAL::HAL& hal;

libraries/AP_Filesystem/posix_compat.h

@@ -87,7 +87,9 @@ int apfs_remove(const char *pathname);
 #define ftell(stream) apfs_ftell(stream)
 #define freopen(pathname, mode, stream) apfs_freopen(pathname, mode, stream)
 #define remove(pathname) apfs_remove(pathname)
+#if !defined(__APPLE__)
 int sprintf(char *str, const char *format, ...);
+#endif
 
 #ifdef __cplusplus
 }