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
out.println( " rlineto " );
		out.print( 0 );
		out.print( " " );
		out.print( height );
		out.println( " rlineto " );
		out.print( -width );
		out.print( " " );
		out.print( 0 );
		out.println( " rlineto " );
		out.print( 0 );
		out.print( " " );
		out.print( -height );
		out.println( " rlineto " );
	}
	/**
	 * Draws background image in a rectangle area with specified repeat pattern.
	 * <br>
	 * <br>
	 * The repeat mode can be: <table border="solid">
	 * <tr>
	 * <td align="center"><B>Name</td>
	 * <td align="center"><B>What for</td>
	 * </tr>
	 * <tr>
	 * <td>no-repeat</td>
	 * <td>Don't repeat.</td>
	 * </tr>
	 * <tr>
	 * <td>repeat-x</td>
	 * <td>Only repeat on x orientation.</td>