Update rhino and jshint.

Rhino JAR updated to latest stable release: 1.7.7.

JSHint updated to jshint/jshint#2855
which is based on 2.9.1 and restores CLI functionality to the Rhino
build.

Author: cscott

.jshintrc

@@ -0,0 +1,9 @@
+{
+  "curly":      true,
+  "forin":      true,
+  "latedef":    true,
+  "evil":       true,
+  "loopfunc":   true,
+  "undef":      true,
+  "rhino":      false
+}

build.xml

@@ -79,8 +79,9 @@
         <exec executable="java" failonerror="true">
             <arg line="-jar"/>
             <arg path="${lib.dir}/js.jar"/>
+            <arg line="-opt -1"/>
             <arg path="${lib.dir}/jshint.js" />
-            <arg line="${jsfiles.clean} curly=true,forin=true,latedef=true,evil=true,loopfunc=true,undef=true,rhino=false" />
+            <arg line="${jsfiles.clean}" />
         </exec>
     </target>