Update HelloWorld.smali

-o option does not seem to work with latest smali version.
Hence modified first command in comments section.

examples/HelloWorld/HelloWorld.smali

@@ -3,7 +3,7 @@
 #Ye olde hello world application
 #To assemble and run this on a phone or emulator:
 #
-#java -jar smali.jar -o classes.dex HelloWorld.smali
+#java -jar smali.jar a -o classes.dex HelloWorld.smali
 #zip HelloWorld.zip classes.dex
 #adb push HelloWorld.zip /data/local
 #adb shell dalvikvm -cp /data/local/HelloWorld.zip HelloWorld
@@ -24,4 +24,4 @@
     invoke-virtual {v0, v1}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
 
     return-void
-.end method
+.end method