Add script for build testing patches

This is intended to make it easier to describe to users on JIRA how
they should test build patches in a standardized manner and how to
collect a full build log that includes the exact git commit they are
building.
FS-6093 --resolve
add legacy subdir for mods with 5.1 edition of mod_lua, change languages/mod_lua to legacy/languages/mod_lua in modules.conf to use older lua mod
reswig
expand variables in originate strings