Nikkei soars 1.6 pct to near 2-wk high as exporters jump on weak yen

* Exporters lead the way as yen weakens * Dentsu jumps on forecast hike * Contractors weak on poor earnings concern * China policy meeting in focus but limited impact on market - analyst By Ayai Tomisawa TOKYO, Nov 12 (Reuters) - Japanese stocks sped to a near two-week high on Tuesday morning, as exporters benefited from a softer yen although contractors sagged on worries about their earnings. The benchmark Nikkei share average rose 1.6 percent to 14,493.90 in mid-mornin