gltf: improve embedded data discovery
gltf: improve embedded data discovery

Some editors seems to use the image resource's mime type (e.g. "image/png") for data embedded uris instead of "application/octet-stream".

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