update ant build script to android-19
update ant build script to android-19

guardianproject/ChatSecureAndroid,Heart2009/ChatSecureAndroid,n8fr8/AwesomeApp,joskarthic/chatsecure,eighthave/ChatSecureAndroid,n8fr8/ChatSecureAndroid,anvayarai/my-ChatSecure,guardianproject/ChatSecureAndroid,n8fr8/ChatSecureAndroid,n8fr8/AwesomeApp,prembasumatary/ChatSecureAndroid,n8fr8/AwesomeApp,maheshwarishivam/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,10045125/ChatSecureAndroid,kden/ChatSecureAndroid,ChatSecure/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,anvayarai/my-ChatSecure,bonashen/ChatSecureAndroid,maheshwarishivam/ChatSecureAndroid,maheshwarishivam/ChatSecureAndroid,eighthave/ChatSecureAndroid,bonashen/ChatSecureAndroid,kden/ChatSecureAndroid,eighthave/ChatSecureAndroid,anvayarai/my-ChatSecure,10045125/ChatSecureAndroid,bonashen/ChatSecureAndroid,31H0B1eV/ChatSecureAndroid,31H0B1eV/ChatSecureAndroid,joskarthic/chatsecure,n8fr8/ChatSecureAndroid,Heart2009/ChatSecureAndroid,ChatSecure/ChatSecureAndroid,31H0B1eV/ChatSecureAndroid,ChatSecure/ChatSecureAndroid,h2ri/ChatSecureAndroid,Heart2009/ChatSecureAndroid,10045125/ChatSecureAndroid,guardianproject/ChatSecureAndroid,h2ri/ChatSecureAndroid,kden/ChatSecureAndroid,ChatSecure/ChatSecureAndroid,joskarthic/chatsecure,h2ri/ChatSecureAndroid