coredump: do not coredump in setting up logger

If log_parse_environment() or log_set_target_and_open() triggers
assertion or so, then we may enter endless loop. Let's disable coredump
earlier.

src/coredump/coredump.c

@@ -25,14 +25,14 @@ static int run(int argc, char *argv[]) {
         if (streq_ptr(argv[1], "--backtrace"))
                 return coredump_backtrace(argc, argv);
 
+        /* Make sure we never enter a loop. */
+        (void) set_dumpable(SUID_DUMP_DISABLE);
+
         /* First, log to a safe place, since we don't know what crashed and it might be journald which we'd
          * rather not log to then. */
         log_parse_environment();
         log_set_target_and_open(LOG_TARGET_KMSG);
 
-        /* Make sure we never enter a loop. */
-        (void) set_dumpable(SUID_DUMP_DISABLE);
-
         r = sd_listen_fds(false);
         if (r < 0)
                 return log_error_errno(r, "Failed to determine the number of file descriptors: %m");