revise method of handling hg id for build info * Makefile.am (HG-ID): New target and file to distribute. * build-info.h: Don't include config.h. * build-info.in.cc: Strip CR from line endings. * build-info.h, build-info.in.cc (octave_hg_id): Rename from oct_hg_id. (octave_build_date): Rename from oct_build_date. (octave_build_time): Rename from oct_build_time. Change all callers. * toplev.cc (F__octave_config_info__): Rename fields: builddate to build_date, buildtime to build_time, hgid to hg_id, and releasedate to * libinterp/module.mk (upate_hg_id): Delete rule. (octinclude_HEADERS): Include build-info.h in the list. (BUILT_SOURCES): Remove update_hg_id from the list. (libinterp/build-info.cc): Don't depend on build-aux/mk-build-info.sh. Depend on HG-ID instead of libinterp/hg.id. Call sed directly here instead of using a shell script. * build-aux/mk-build-info-cc.in.sh: Delete. * Makefile.am (EXTRA_DIST): Remove build-aux/mk-build-info-cc.sh.in from the list. (GEN_CONFIG_SHELL): Remove build-aux/mk-build-info-cc.sh from the list. * configure.ac (OCTAVE_CONFIG_MOVE_IF_CHANGE_FILES): Remove build-aux/mk-build-info-cc.sh from the list.