Shareholders Toast Brewers' Merger  BRUSSELS/SAO PAULO (Reuters) - Shareholders gave their  blessing on Friday for Belgium's Interbrew &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=INTB.BR target=/stocks/quickinfo/fullquote"&gt;INTB.BR&lt;/A&gt; to buy  Brazil's AmBev &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=AMBV4.SA target=/stocks/quickinfo/fullquote"&gt;AMBV4.SA&lt;/A&gt;&lt;ABV.N&gt; in a \$9.7 billion deal that  will create the world's largest brewer.