quartz: fallback for A1 images on little endian archs

Quartz uses a bit ordering that is consistent with cairo on big
endian architectures, but isn't on little endian architectures.

Fixes a1-mask and large-source-roi (on little endian)

src/cairo-quartz-surface.c

@@ -208,9 +208,11 @@ _cairo_quartz_create_cgimage (cairo_format_t format,
 	    break;
 
 	case CAIRO_FORMAT_A1:
+#ifdef WORDS_BIGENDIAN
 	    bitsPerComponent = 1;
 	    bitsPerPixel = 1;
 	    break;
+#endif
 
 	default:
 	    return NULL;