Add support for Raspberry PI (arm32)

Author: blar

Makefile

@@ -37,4 +37,5 @@ release:
 		docker run -it --rm -v ${PWD}:/app -e "GOOS=$$platform" -e "GOARCH=amd64" -e "CGO_ENABLED=0" confd_builder go build -ldflags="-s -w -X main.GitSHA=${GIT_SHA}" -o bin/confd-${VERSION}-$$platform-amd64$$extension; \
 	done
 	@docker run -it --rm -v ${PWD}:/app -e "GOOS=linux" -e "GOARCH=arm64" -e "CGO_ENABLED=0" confd_builder go build -ldflags="-s -w -X main.GitSHA=${GIT_SHA}" -o bin/confd-${VERSION}-linux-arm64;
+	@docker run -it --rm -v ${PWD}:/app -e "GOOS=linux" -e "GOARCH=arm" -e "CGO_ENABLED=0" confd_builder go build -ldflags="-s -w -X main.GitSHA=${GIT_SHA}" -o bin/confd-${VERSION}-linux-arm32;
 	@upx bin/confd-${VERSION}-*