Android: fix ext build in case of empty lines at ext_java.files
Android: fix ext build in case of empty lines at ext_java.files

rhomobile/rhodes,tauplatform/tau,tauplatform/tau,rhomobile/rhodes,watusi/rhodes,tauplatform/tau,watusi/rhodes,rhomobile/rhodes,pslgoh/rhodes,tauplatform/tau,watusi/rhodes,rhomobile/rhodes,pslgoh/rhodes,pslgoh/rhodes,watusi/rhodes,pslgoh/rhodes,rhomobile/rhodes,watusi/rhodes,pslgoh/rhodes,watusi/rhodes,tauplatform/tau,watusi/rhodes,pslgoh/rhodes,rhomobile/rhodes,tauplatform/tau,rhomobile/rhodes,pslgoh/rhodes,tauplatform/tau,pslgoh/rhodes,watusi/rhodes,watusi/rhodes,tauplatform/tau,rhomobile/rhodes,watusi/rhodes,rhomobile/rhodes,pslgoh/rhodes,pslgoh/rhodes,tauplatform/tau,tauplatform/tau,rhomobile/rhodes