Less GWT Permutation when develop for Android and iPhone

As you may know, i work for iPhone and Android with GWT, GWTPhonegap and MGWT (at least, I try :) )
So my problem come from the permutation, i have one langage, 2 platform and....64 permutations !!!!

Without wait, how to fix it:

 <set-property name="user.agent" value="safari" />
<set-property name="mobile.user.agent" value="mobilesafari" />
<set-property name="mgwt.os" value="iphone,android" />
<set-property name="phonegap.env" value="yes" />

And u should have only 2 permutation as we need !!!!!!
That's all folk.