Add -debug flag to shell. Will cause it to generate debug for compiled class

files.

js/rhino/toolsrc/org/mozilla/javascript/tools/resources/Messages.properties

@@ -59,7 +59,8 @@ msg.shell.usage =\
     \    -version 100|110|120|130|140|150|160\n\
     \    -opt [-1|0-9]\n\
     \    -f script-filename\n\
-    \    -e script-source
+    \    -e script-source\n\
+    \    -debug
 
 
 msg.help =\

js/rhino/toolsrc/org/mozilla/javascript/tools/shell/Main.java

@@ -280,6 +280,10 @@ public class Main
                 global.setSealedStdLib(true);
                 continue;
             }
+            if (arg.equals("-debug")) {
+                shellContextFactory.setGeneratingDebug(true);
+                continue;
+            }
             usageError = arg;
             break goodUsage;
         }

js/rhino/toolsrc/org/mozilla/javascript/tools/shell/ShellContextFactory.java

@@ -45,6 +45,7 @@ public class ShellContextFactory extends ContextFactory
     private boolean strictMode;
     private int languageVersion;
     private int optimizationLevel;
+    private boolean generatingDebug;
     private ErrorReporter errorReporter;
 
     protected boolean hasFeature(Context cx, int featureIndex)
@@ -64,6 +65,7 @@ public class ShellContextFactory extends ContextFactory
         if (errorReporter != null) {
             cx.setErrorReporter(errorReporter);
         }
+        cx.setGeneratingDebug(generatingDebug);
         super.onContextCreated(cx);
     }
 
@@ -93,4 +95,8 @@ public class ShellContextFactory extends ContextFactory
         this.errorReporter = errorReporter;
     }
 
+    public void setGeneratingDebug(boolean generatingDebug) 
+    {
+      this.generatingDebug = generatingDebug;
+    }
 }