build windows binaries with .exe suffix

Author: msau42

build.make

@@ -63,7 +63,7 @@ endif
 build-%:
 	mkdir -p bin
 	CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-X main.version=$(REV) -extldflags "-static"' -o ./bin/$* ./cmd/$*
-	CGO_ENABLED=0 GOOS=windows go build -a -ldflags '-X main.version=$(REV) -extldflags "-static"' -o ./bin/$* ./cmd/$*
+	CGO_ENABLED=0 GOOS=windows go build -a -ldflags '-X main.version=$(REV) -extldflags "-static"' -o ./bin/$*.exe ./cmd/$*
 
 container-%: build-%
 	docker build -t $*:latest -f $(shell if [ -e ./cmd/$*/Dockerfile ]; then echo ./cmd/$*/Dockerfile; else echo Dockerfile; fi) --label revision=$(REV) .