Add windows version of setup-ant.sh file

setup-ant.bat

@@ -0,0 +1,16 @@
+@ECHO OFF
+SETLOCAL enabledelayedexpansion
+
+SET "target=android-19"
+
+REM Update ant setup in project and all sub-projects
+SET "pattern=project.properties"
+FOR /R "./external/" %%# in (*.properties) DO (
+    ECHO %%~nx# | FIND "%pattern%" 1>NUL && (
+        SET current_dir=%~d0%%~p#
+        SET current_dir=!current_dir:\=/!
+        ECHO Updating ant setup in "!current_dir!"
+        CALL android update lib-project -t %target% -p "!current_dir!"
+    )
+)
+CALL android update project -p . --subprojects -t %target% --name Lightning

setup-ant.sh

@@ -2,6 +2,7 @@
 
 target="android-19"
 
+# Update ant setup in project and all sub-projects
 for f in `find external/ -name project.properties`; do
     projectdir=`dirname $f`
     echo "Updating ant setup in $projectdir:"