(*.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.
* TODO: Document work needed on &fn and &array.
* printcmd.c (print_address_symbolic): New arg is the prefix
to print if a name is printed.
(print_address_demangle): Honor "set print address" now.
Use new arg above to improve spacing of output.
* valprint.c (val_print): When printing function pointers,
print symbolic form too.
* breakpoint.c (breakpoint_1): Use new print_address_symbolic.
