Correctly include <stdlib.h> in javascript main.
Correctly include <stdlib.h> in javascript main.

Already fixed in 3.2, this header is needed since it's where setenv
is declared and we should not assume it to be already included.

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