Intel Sets Upbeat Tone on Wall Street  LONDON (Reuters) - U.S. shares are set to open higher on  Friday, buoyed by Intel Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=INTC.O target=/stocks/quickinfo/fullquote"&gt;INTC.O&lt;/A&gt; after the world's  largest chip maker raised its quarterly revenue target due to  strong demand, but all eyes will be on jobs data before the  opening.