AppVeyor: Force installing SCons 3.0.1
AppVeyor: Force installing SCons 3.0.1

3.0.2 was released today and when installed via pip, it seems to be
missing from the PATH.

ex/godot,vnen/godot,Valentactive/godot,Paulloz/godot,sanikoyes/godot,DmitriySalnikov/godot,guilhermefelipecgs/godot,firefly2442/godot,guilhermefelipecgs/godot,godotengine/godot,godotengine/godot,Shockblast/godot,ex/godot,honix/godot,vkbsb/godot,josempans/godot,okamstudio/godot,ZuBsPaCe/godot,vkbsb/godot,godotengine/godot,firefly2442/godot,Valentactive/godot,godotengine/godot,ex/godot,DmitriySalnikov/godot,Valentactive/godot,Zylann/godot,Paulloz/godot,vnen/godot,ZuBsPaCe/godot,Zylann/godot,guilhermefelipecgs/godot,Shockblast/godot,firefly2442/godot,honix/godot,josempans/godot,sanikoyes/godot,MarianoGnu/godot,josempans/godot,Zylann/godot,groud/godot,groud/godot,josempans/godot,MarianoGnu/godot,MarianoGnu/godot,sanikoyes/godot,vkbsb/godot,Paulloz/godot,firefly2442/godot,okamstudio/godot,josempans/godot,akien-mga/godot,guilhermefelipecgs/godot,Zylann/godot,pkowal1982/godot,okamstudio/godot,ZuBsPaCe/godot,Shockblast/godot,Shockblast/godot,godotengine/godot,DmitriySalnikov/godot,sanikoyes/godot,pkowal1982/godot,BastiaanOlij/godot,vkbsb/godot,honix/godot,Valentactive/godot,vkbsb/godot,groud/godot,Faless/godot,okamstudio/godot,Faless/godot,sanikoyes/godot,Valentactive/godot,okamstudio/godot,ex/godot,okamstudio/godot,MarianoGnu/godot,honix/godot,guilhermefelipecgs/godot,Zylann/godot,ZuBsPaCe/godot,ex/godot,pkowal1982/godot,honix/godot,akien-mga/godot,groud/godot,BastiaanOlij/godot,BastiaanOlij/godot,vkbsb/godot,firefly2442/godot,Shockblast/godot,Paulloz/godot,josempans/godot,godotengine/godot,Faless/godot,Faless/godot,Faless/godot,BastiaanOlij/godot,Zylann/godot,firefly2442/godot,Shockblast/godot,guilhermefelipecgs/godot,vnen/godot,BastiaanOlij/godot,Valentactive/godot,ZuBsPaCe/godot,vnen/godot,DmitriySalnikov/godot,ex/godot,vkbsb/godot,Faless/godot,Paulloz/godot,pkowal1982/godot,josempans/godot,ZuBsPaCe/godot,Paulloz/godot,pkowal1982/godot,pkowal1982/godot,Valentactive/godot,guilhermefelipecgs/godot,akien-mga/godot,MarianoGnu/godot,ex/godot,okamstudio/godot,akien-mga/godot,ZuBsPaCe/godot,akien-mga/godot,ex/godot,pkowal1982/godot,akien-mga/godot,ZuBsPaCe/godot,vkbsb/godot,akien-mga/godot,sanikoyes/godot,honix/godot,Faless/godot,BastiaanOlij/godot,godotengine/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,vnen/godot,Shockblast/godot,groud/godot,firefly2442/godot,okamstudio/godot,okamstudio/godot,josempans/godot,vnen/godot,MarianoGnu/godot,BastiaanOlij/godot,vnen/godot,DmitriySalnikov/godot,vnen/godot,MarianoGnu/godot,BastiaanOlij/godot,Shockblast/godot,Valentactive/godot,godotengine/godot,sanikoyes/godot,groud/godot,Zylann/godot,Faless/godot,okamstudio/godot,DmitriySalnikov/godot,MarianoGnu/godot,akien-mga/godot,pkowal1982/godot,Zylann/godot,sanikoyes/godot,firefly2442/godot,Paulloz/godot