Disabling test_drawImage_nonAutoScalableGC_bug_2504 due to test failing on Linux

Fixes #2557

Author: arunjose696

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

@@ -250,8 +250,10 @@ public void test_dispose() {
 
 @Test
 public void test_drawImage_nonAutoScalableGC_bug_2504() {
+	assumeTrue(!System.getProperty("os.name").toLowerCase().contains("linux"),
+			"Disabled due to Test failing on Linux https://github.com/eclipse-platform/eclipse.platform.swt/issues/2557");
 	Shell shell = new Shell(display);
-    float targetScale = 2f;
+	float targetScale = 2f;
     int srcSize = 50;
     Image image = new Image(display, srcSize, srcSize);
     GC gcSrc = new GC(image);