clock-util: rename function argument

src/shared/clock-util.h

@@ -4,7 +4,7 @@
 #include <time.h>
 
 int clock_is_localtime(const char* adjtime_path);
-int clock_set_timezone(int *min);
+int clock_set_timezone(int *ret_minutesdelta);
 int clock_reset_timewarp(void);
 int clock_get_hwclock(struct tm *tm);
 int clock_set_hwclock(const struct tm *tm);