tests: Remove test products at the very end.
tests: Remove test products at the very end.

Addressing:
ERROR: files left in build directory after distclean:
./tests/API/OVAL/report_variable_values/report_variable_values.stderr.AStvL5
./tests/API/OVAL/report_variable_values/report_variable_values.res.Er7vfK.xml

ybznek/openscap,postfix/openscap,mpreisler/openscap,OpenSCAP/openscap,openprivacy/openscap,OpenSCAP/openscap,postfix/openscap,jan-cerny/openscap,openprivacy/openscap,ybznek/openscap,ybznek/openscap,OpenSCAP/openscap,jan-cerny/openscap,isimluk/openscap,openprivacy/openscap,isimluk/openscap,postfix/openscap,postfix/openscap,Hexadorsimal/openscap,isimluk/openscap,jan-cerny/openscap,isimluk/openscap,redhatrises/openscap,mpreisler/openscap,mpreisler/openscap,jan-cerny/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,openprivacy/openscap,ybznek/openscap,OpenSCAP/openscap,isimluk/openscap,redhatrises/openscap,isimluk/openscap,jan-cerny/openscap,openprivacy/openscap,OpenSCAP/openscap,OpenSCAP/openscap,Hexadorsimal/openscap,mpreisler/openscap,redhatrises/openscap,mpreisler/openscap,postfix/openscap,postfix/openscap,ybznek/openscap,mpreisler/openscap,jan-cerny/openscap,redhatrises/openscap,redhatrises/openscap,redhatrises/openscap,openprivacy/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,ybznek/openscap