Fixed upgrade to ctags in build.xml (oops..)

Author: cmaglie

build/build.xml

@@ -885,7 +885,7 @@
     <copy file="${staging_folder}/arduino-builder-windows/arduino-builder.exe" tofile="windows/work/arduino-builder.exe" />
     <chmod perm="755" file="windows/work/arduino-builder.exe" />
     <move file="${staging_folder}/arduino-builder-windows/tools" tofile="windows/work/tools-builder"/>
-    <chmod perm="755" file="windows/work/tools-builder/ctags/5.8-arduino5/ctags.exe" />
+    <chmod perm="755" file="windows/work/tools-builder/ctags/5.8-arduino6/ctags.exe" />
     <copy todir="windows/work/hardware" overwrite="true">
       <fileset dir="${staging_folder}/arduino-builder-windows/hardware" includes="*.txt"/>
     </copy>