configure.in: New, Cygnus/GNU style configuration.
automake/compile.am: BSP_SPECS, remove RTEMS_CANONICALIZATION.
automake/lib.am: Remove RTEMS_CANONICALIZATION.
macros/target.m4: Remove RTEMS_CONFIG_SUBDIRS, RTEMS_OUTPUT_SUBDIRS.
macros/enable-rtemsbsp.m4: Add RTEMS_CONFIG_PER_BSP, add setting RTEMS_ROOT.
macros/multilib.m4: Various minor fixes.
macros/project-root.m4: Remove setting PROJECT_TOPdir, PROJECT_ROOT, RTEMS_ROOT.
macros/rtems-top.m4: Remove RTEMS_CANONICALIZATION, TARGET_SUBDIRS; Add with_target_subdirs, PROJECT_TOPdir, PROJECT_ROOT.
## is not extensively tested.
## CPPFLAGS and CFLAGS part of this call?
