Windows: Fix case of imm32 for case-sensitive MinGW build
Windows: Fix case of imm32 for case-sensitive MinGW build

Fixes #16713.

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