Target Posts Higher Quarterly Profit  NEW YORK (Reuters) - Target Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=TGT.N target=/stocks/quickinfo/fullquote"&gt;TGT.N&lt;/A&gt;, the No. 2 U.S.  discount retailer, on Thursday posted a higher quarterly  profit, boosted by stronger sales and gains from the sale of  its Mervyn's department store chain.