Revert "Removed support deprecated (//@|/*@) source(URL|MappingURL)="

test/mjsunit/regress/regress-crbug-481896.js

Index: test/mjsunit/regress/regress-crbug-481896.js
diff --git a/test/mjsunit/regress/regress-crbug-481896.js b/test/mjsunit/regress/regress-crbug-481896.js
index 1ef0e5010a34d804eb8f54b2130256add097db2a..0d5c650f1efed67a110ec2c6751961887dc4ba7d 100644
--- a/test/mjsunit/regress/regress-crbug-481896.js
+++ b/test/mjsunit/regress/regress-crbug-481896.js
@@ -29,7 +29,7 @@ function install() {
   eval("this.dynamic = function dynamic() { \n" +
        "  print(\"> dynamic\");  // Break\n" +
        "}\n" +
-       "//# sourceURL=dynamicScript");
+       "//@ sourceURL=dynamicScript");
 }
 
 install();
@@ -53,4 +53,4 @@ Debug.setListener(null);
 assertNull(exception);
 assertEquals(2, break_count);
 
-//# sourceURL=staticScript
+//@ sourceURL=staticScript