system/coredump: Fix missing loglevel to logmask conversion.

The current setlogmask call used in the coredump app specifies a raw log level
instead of a bitmask, and this causes wrong evaluations later on when that value
is checked against a mask. Therefore the LOG_UPTO macro is added for conversion.

Signed-off-by: Niccolò Maggioni <nicco.maggioni+nuttx@gmail.com>

Author: nmaggioni

system/coredump/coredump.c

@@ -418,7 +418,7 @@ static int coredump_now(int pid, FAR char *filename)
 #endif
 
   printf("Start coredump:\n");
-  logmask = setlogmask(LOG_ALERT);
+  logmask = setlogmask(LOG_UPTO(LOG_ALERT));
 
   /* Initialize hex output stream */