fix #H7159 - orc hero can start with lembas wafers

Orc heroes get an extra food item ("to compensate for generally
inferior equipment") and it could randomly be lembas wafers (or
cram rations), and Ranger heroes always started with cram rations
even when they're orcs.  Fixing the latter was simple, but the
normal race-based substitutions weren't applied to randomly
generated items, so the fix for the former required a bit of code
reorganization in ini_inv().

Elf heroes already get lembas instead of cram; do the reverse for
dwarves (although I don't think this case can happen--no role gets
lembas wafers and only orcs and always-human tourists get random
food); give orc heroes tripe instead of either lembas or cram.

doc/fixes36.2

@@ -16,6 +16,7 @@ numeric hilite_status values didn't allow negative numbers (needed for AC);
 	change them to accept leading '-', also accept unary '+' as a no-op
 permanent inventory window was updated too soon when a scroll of charging
 	was used to [re]charge an item, not reflecting the item's change(s)
+for starting inventory, don't give an orc hero lembas wafers or cram rations
 
 
 Fixes to Post-3.6.1 Problems that Were Exposed Via git Repository