fix(examples): lengthen the third example string

The command line for running the example via cargo run is "target/debug/examples/killmyargv", which has a byte length of 32. We need an example to show the behavior of each OS when writing to environ with a null character in the middle.

examples/killmyargv.rs

@@ -56,7 +56,7 @@ fn main() {
     printenv();
     pause!();
 
-    mem.set(b"aaaaaaaaaaaaaaaaaaaa\0bbbbb12\088");
+    mem.set(b"aaaaaaaaaaaaaaaaaaaa\0bbbbb12\09988");
     println!("set le argv");
     printenv();
     pause!();