* Makefile.in (INCLUDES): Reference gcc via $MULTIBUILDTOP.
        (FLAGS_TO_PASS): Added.
        (runtime-info.h): Reference cc1ibj via $MULTIBUILDTOP.
        * archive.c: Change config.h to tconfig.h.
        * configure.in: Find gcc's object directory even for multilibs.

Co-Authored-By: Jeffrey A Law <law@cygnus.com>

From-SVN: r22725