* Makefile.in (TARDIRS): Add sparclite demo dir.

* Makefile.in (TARDIRS):  Add sparclite demo dir.
(*.tab.c):  Change dependency on Makefile to depend on
Makefile.in, otherwise it always rebuilds after configuring.
Force output *.tab.c file into current directory even in "make"
versions that rewrite dependent file names used in command lines.

* TODO:  Remove some things we did.
* am29k-opcode.h, convx-opcode:  Remove; now in ../include/opcode.
* os68k-xdep.c:  Remove; useless file (os68k is a target only).
* convex-pinsn.c:  Use ../include/opcode/convex.h.  Add CONST.
* symtab.h:  Eliminate unnamed unions and structs.