missing: define MS_STRICTATIME if not defined already

src/core/mount-setup.c

@@ -39,6 +39,7 @@
 #include "strv.h"
 #include "mkdir.h"
 #include "path-util.h"
+#include "missing.h"
 
 #ifndef TTY_GID
 #define TTY_GID 5

src/shared/missing.h

@@ -184,4 +184,8 @@ static inline pid_t gettid(void) {
 #define SCM_SECURITY 0x03
 #endif
 
+#ifndef MS_STRICTATIME
+#define MS_STRICTATIME (1<<24)
+#endif
+
 #endif