Show all interpreter arguments on --scripts query (ticket #847)

Show all interpreter arguments on --scripts query (ticket #847)

- Previously any arguments to interpreter were invisible unless
  you happened to know that RPMTAG_FOOPROG are actually string
  arrays despite their type showing plain string, and queried
  as arrays. This makes all the arguments for all scriptlets
  supporting interpreter arguments visible on --scripts query
  and also serves as an example on how to properly query them.i
- Perhaps worth noting is the exact formatting of the query:
  "(using[ %{PRETRANSPROG}]" instead of the more typical style of
  "(using [%{PRETRANSPROG} ]" to avoid extra trailing blanks.