Add release tag to travis and Makefile

.travis.yml

@@ -29,7 +29,7 @@ install:
   - gox -build-toolchain -os "$GOX_OS"
 
 script:
-  - gox -verbose -os "${GOX_OS}" ./cmd/restic
+  - gox -verbose -os "${GOX_OS}" -tags "release" ./cmd/restic
   - go run run_tests.go all.cov
   - GOARCH=386 go test ./...
   - goveralls -coverprofile=all.cov -service=travis-ci -repotoken "$COVERALLS_TOKEN" || true

Makefile

@@ -26,7 +26,7 @@ all: restic
 
 %: cmd/% .gopath $(SOURCE)
 	cd $(BASEPATH) && \
-		go build -a -ldflags "-s" -o $@ ./$<
+		go build -a -tags release -ldflags "-s" -o $@ ./$<
 
 %.debug: cmd/% .gopath $(SOURCE)
 	cd $(BASEPATH) && \