vlib: use malloc_noscan() where possible (#10465)

examples/ttf_font/example_ttf.v

@@ -145,7 +145,7 @@ fn main() {
 	app.ttf_render << &ttf.TTF_render_Sokol{
 		bmp: &ttf.BitMap{
 			tf: &(app.tf[0])
-			buf: unsafe { malloc(32000000) }
+			buf: unsafe { malloc_noscan(32000000) }
 			buf_size: (32000000)
 			color: 0xFF0000FF
 			// style: .raw