fix #H4274 - monster growing up changes gender

Most of the humanoid species have Lords and several have Kings,
but none of them have Ladies or Queens.  When a female grows up
to reach that level of monster, she changes into male.  This fix
gives an alternate message acknowledging that change rather than
prevent taking on the stronger form.  A better fix would be to
add ogre ladies and dwarf queens as separate monsters, but doing
so will break 3.6.0 save file compatibility.

(I started out with an alternate fix, adding mons[].fname for the
dozen or so creatures which warrant an alternate name for females.
But that requires statues, figurines, corpses, tins, and maybe
even eggs to track gender [some statues already do, and corpses
and statues with attached mtraits also implicitly do] and to not
stack with equivalent ones of the opposite gender.  Plus glyphs
to track them, and new tiles.  It was becoming too complicated
for such a relatively unimportant feature.  Separate monsters is
the way to go, deferred until save file format changes again.)

doc/fixes36.1

@@ -188,6 +188,8 @@ grammar bit: polyself w/ gender change yielded "you turn into a Elvenking"
 some blindness cures ignored u.ucreamed
 some instances of stun or confusion timers were being overridden rather than
 	incremented when new stun or confusion damage was suffered
+female gnome who gains level can grow up into male-only gnome lord; give an
+	an alternate message instead of prohibiting the promotion
 
 
 Platform- and/or Interface-Specific Fixes