[BUGFIX] Reorder SQL queries in EM upgrade script to report changed rows

Make the actual migration come *last* so that `sql_affected_rows` correctly reports the number of rows that were changed.

class.ext_update.php

@@ -18,11 +18,11 @@ public function access() {
 	 * @return string
 	 */
 	public function main() {
-		$GLOBALS['TYPO3_DB']->exec_UPDATEquery('tt_content', 'CType = \'fed_fce\'', array('CType' => 'fluidcontent_content'));
 		$GLOBALS['TYPO3_DB']->exec_TRUNCATEquery('cf_extbase_reflection');
 		$GLOBALS['TYPO3_DB']->exec_TRUNCATEquery('cf_extbase_reflection_tags');
 		$GLOBALS['TYPO3_DB']->exec_TRUNCATEquery('cf_extbase_object');
 		$GLOBALS['TYPO3_DB']->exec_TRUNCATEquery('cf_extbase_object_tags');
+		$GLOBALS['TYPO3_DB']->exec_UPDATEquery('tt_content', 'CType = \'fed_fce\'', array('CType' => 'fluidcontent_content'));
 		return $GLOBALS['TYPO3_DB']->sql_affected_rows() . ' rows have been updated';
 	}
 }