Use -race on amd64 only, -race is only supported by go test on amd64

Author: vivkong

Makefile

@@ -68,7 +68,11 @@ sanitize:
 	hooks/run_vet.sh
 
 test-unit: clean sanitize build
+ifeq ($(ARCH),amd64)
 	GOARCH=$(ARCH) go test --test.short -race ./... $(FLAGS)
+else
+	GOARCH=$(ARCH) go test --test.short ./... $(FLAGS)
+endif
 
 test-unit-cov: clean sanitize build
 	hooks/coverage.sh