Bristol-Myers Posts Lower Profit  NEW YORK (Reuters) - Bristol-Myers Squibb Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=BMY.N target=/stocks/quickinfo/fullquote"&gt;BMY.N&lt;/A&gt; on  Friday reported a lower third-quarter profit as revenue fell  amid intense competition for its products from rivals and  generic drugs.