tests: Try not to split fields in randomdecl sanity test.

tests: Try not to split fields in randomdecl sanity test.

HP-UX 11 awk will simply exit with an error if any input line has more
than 199 fields.  To avoid this happening in the randomdecl sanity test,
set FS to some garbage because we don't actually use any of the field
variables in this script.