Release build misses `-s -w` flag

[wxiaoguang]

@techknowlogick

$(EXECUTABLE): $(GO_SOURCES) $(TAGS_PREREQ)
	CGO_CFLAGS="$(CGO_CFLAGS)" $(GO) build $(GOFLAGS) $(EXTRA_GOFLAGS) -tags '$(TAGS)' -ldflags '-s -w $(LDFLAGS)' -o $@

.PHONY: release-linux
release-linux: | $(DIST_DIRS)
	CGO_CFLAGS="$(CGO_CFLAGS)" $(GO) run $(XGO_PACKAGE) -go $(XGO_VERSION) -dest $(DIST)/binaries -tags 'netgo osusergo $(TAGS)' -ldflags '-linkmode external -extldflags "-static" $(LDFLAGS)' -targets '$(LINUX_ARCHS)' -out gitea-$(VERSION) .

[techknowlogick]

thanks. I've just created #33041 and I've included those flags for the windows, darwin, and freebsd releases too.