make-release-build: include 'v' in release APK name, following convention
make-release-build: include 'v' in release APK name, following convention

The existing ChatSecure APKs have a 'v' before the version.

kden/ChatSecureAndroid,guardianproject/ChatSecureAndroid,n8fr8/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,h2ri/ChatSecureAndroid,eighthave/ChatSecureAndroid,anvayarai/my-ChatSecure,kden/ChatSecureAndroid,anvayarai/my-ChatSecure,anvayarai/my-ChatSecure,h2ri/ChatSecureAndroid,bonashen/ChatSecureAndroid,Heart2009/ChatSecureAndroid,Heart2009/ChatSecureAndroid,eighthave/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,n8fr8/AwesomeApp,n8fr8/ChatSecureAndroid,h2ri/ChatSecureAndroid,Heart2009/ChatSecureAndroid,bonashen/ChatSecureAndroid,n8fr8/AwesomeApp,prembasumatary/ChatSecureAndroid,guardianproject/ChatSecureAndroid,guardianproject/ChatSecureAndroid,n8fr8/ChatSecureAndroid,bonashen/ChatSecureAndroid,kden/ChatSecureAndroid,n8fr8/AwesomeApp,eighthave/ChatSecureAndroid