bootstrap: use of ';' in sed scripts is not portable.

bootstrap: use of ';' in sed scripts is not portable.

* gl/build-aux/bootstrap.in (require_buildreq_automake)
(require_dotgitmodules_parameters, require_package)
(func_update_po_files): Use '\n' or -e to separate sed commands,
instead of ';'.
* gl/build-aux/extract-trace (func_autoconf_configure)
(func_extract_trace_first): Likewise.
* gl/funclib.sh: Likewise.
(func_tr_sh): Likewise.
* gl/build-aux/options-parser (func_usage_message): Likewise.
* bootstrap: Regenerate.
Reported by Robert Boehne.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>