Bug 196272 Text position is incorrect in postscript and ppt.
Text position need to be ajusted according to baseline position.
engine/org.eclipse.birt.report.engine.emitter.postscript/src/org/eclipse/birt/report/engine/emitter/postscript/PostscriptWriter.java
public static final String TIMES_BOLD = BaseFont.TIMES_BOLD;
	
	public static final String TIMES_ITALIC = BaseFont.TIMES_ITALIC;
	
	public static final String TIMES_BOLDITALIC = BaseFont.TIMES_BOLDITALIC;
	
	public static final String ZAPFDINGBATS = BaseFont.ZAPFDINGBATS;
	/**
	 * Default page height.
	 */
	final protected static int DEFAULT_PAGE_HEIGHT = 792;
	/**
	 * Default page width.
	 */
	final protected static int DEFAULT_PAGE_WIDTH = 612;
	/**
	 * Table mapping decimal numbers to hexadecimal numbers.
	 */
	final protected static byte hd[] = {'0', '1', '2', '3', '4', '5', '6', '7',
			'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
	/**
	 * Output stream where postscript to be output.
	 */
	protected PrintStream out = System.out;
	/**
	 * The current color
	 */
	protected Color clr = Color.white;
	/**
	 * The current font