sr econ officials from major indus countries reject proposals put forth by OECD Secretariat for bolstering world econ growth; officials say rejection stems from fear of renewed inflation, reluctance to offer concessions in advance of Bonn summit meeting and irritation with what is seen as OECD Secretariat's efforts to dictate econ policy to its member govts; rejection raises fresh doubts that pact on any significant new measures to accelerate econ growth and reduce unemployment will be reached at Bonn summit (M)