Corrected TextLayout to produce right number of lines when '\r\n'

sequence comes. Incorporated new failing and passing junits.

Fixes #184

Author: deepika-u

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_graphics_TextLayout.java

@@ -1273,4 +1273,33 @@ public void test_Bug579335_win32_StyledText_LongLine() {
 			font.dispose();
 	}
 }
+@Test
+public void test_getLineCount() {
+	//Skipping this test for GTK and Cocoa as this pr #1320 applies only for windows platform.
+	//Without pr #1320(master) : Number of lines: 11 (for Cocoa it is : 10)
+	//Without pr #1320(master) : Bounds of the text layout: Rectangle {0, 0, 30, 220} (for Cocoa it is : {0, 0, 27, 176})
+	//Expected : Number of lines: 7 (for Cocoa it is : 10)
+    //Expected : Bounds of the text layout: Rectangle {0, 0, 43, 140} (for Cocoa it is : {0, 0, 27, 176})
+	if (SwtTestUtil.isGTK || SwtTestUtil.isCocoa) {
+		//TODO Fix not applicable for GTK and Cocoa.
+		if (SwtTestUtil.verbose) {
+			System.out.println("Excluded test_getLineCount(org.eclipse.swt.tests.junit.Test_org_eclipse_swt_graphics_TextLayout)");
+		}
+		return;
+	}
+
+	TextLayout layout = new TextLayout(display);
+	try {
+		String text = "\rabc\ndef\r\rghi\n\njkl\r\nmno\r\n\r\npqr\r";
+		layout.setText(text);
+	    int lineCount = layout.getLineCount();
+		assertEquals(7, lineCount);
+
+		Rectangle bounds = layout.getBounds();
+	    assertEquals(43, bounds.width);
+	    assertEquals(140, bounds.height);
+	} finally {
+		layout.dispose();
+	}
+}
 }