automation: add extra arguments when building Inno
These were being fed into the template expansion but not being
used. This meant --version was not getting set when it should have
been.
Differential Revision: https://phab.mercurial-scm.org/D8482
#require emacs
$ emacs -q -no-site-file -batch -l $TESTDIR/../contrib/hg-test-mode.el \
> -f ert-run-tests-batch-and-exit
Running 1 tests (*) (glob)
passed 1/1 hg-test-mode--compilation-mode-support
Ran 1 tests, 1 results as expected (*) (glob)