Hello,

This simplfies the handling of subdirectories:

- all the subdir object files now go in libgdb.a
both ./gdb and ./tui always need to link against them

- puts "main.o" in libgdb.a
again ./gdb and ./tui always link against it

- deletes CONFIG_INIT and CONFIG_LIB_OBS
as they overlap CONFIG_SRCS and CONFIG_OBS

committed,
Andrew

PS: And configures with the correct autoconf.  Patch for ./tui pending.