add set RHO_WP8 constant for ruby part and enable stringscan extension
add set RHO_WP8 constant for ruby part and enable stringscan extension

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