MIDEAST STOCKS-Saudi earnings, oil boost Gulf, Egypt breaks chart barrier

* Saudi's SABIC surges after profit drops less than expected * Builder Khodari, Mouwasat Medical also beat estimates * Dubai's Emaar up on chairman's positive comments * Dubai Parks falls on rights issue plan * Egypt's index rises above October peak By Andrew Torchia DUBAI, April 19 (Reuters) - Gulf stock markets rose on Tuesday as several Saudi companies beat first-quarter earnings estimates and oil prices held up better than feared after the failure of Sunday's Doha meeting to agree on an outp