fix #H2397 - "<Mon> turns to flee" when paralyzed (trunk only)

From a bug report, a
monster incapable of moving could yield the message "<Mon> turns to flee!"
when hit by an attack which scared it.  I thought that something to fix
this had already been done, but that wasn't the case.  Now it will give
"The immobile <mon> seems to flinch" instead.  I'd rather use
  mon->data->mmove == 0 ? "immobile <mon>" :
    mon->paralyzed ? "paralyzed <mon>" : "sleeping <mon>"
but it presently isn't possible to distinguish between sleep, paralysis,
and being busy doning armor because mon->mfrozen is used for all three.
(I'm not going to worry about the busy case, even though "immobile" sounds
inaccurate for it.)

     Also, stethoscope and probing were suppressing "scared" after giving
"can't move", in order to reduce the chance of wrapping the top line.
This changes it to display both status conditions so that scared state
isn't hidden when the target is paralyzed or asleep (or busy).

doc/fixes35.0

@@ -377,6 +377,7 @@ when shop prices are adjusted, handle roundoff (integer truncation) better
 for hero poly'd into a monster form that lacks a weapon attack but has a claw
 	attack, use wielded weapon even when claw attack isn't the very first
 rename the SLEEPING property and Sleeping attribute to SLEEPY and Sleepy, resp.
+give alternate message for "<mon> turns to flee" when mon can't move
 
 
 Platform- and/or Interface-Specific Fixes