- Add Arabic

- A flag of for the Arabic language, including the four Pan-Arab colors. Note: This is the 1917 Arab revolt / Hashemite dynasty flag.

   Source:
	http://commons.wikimedia.org/wiki/File:Arabic-Language-Flag.svg

   License:
	I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
	In some countries this may not be legally possible; if so:
	I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

   Converted to 16x11 png by zzz / gimp

- revert ch flag old change

build.xml

@@ -561,6 +561,8 @@
         <copy todir="pkg-temp/docs/" >
           <fileset dir="installer/resources/readme/" includes="readme*.html" />
           <fileset dir="installer/resources/proxy/" includes="*.ht" />
+          <!-- lang_ar.png added in 0.8.4 -->
+          <fileset dir="installer/resources/" includes="icons/flags/lang_ar.png" />
         </copy>
     </target>