Build with -tags netgo.

This avoids using CGO for net/http.

Change-Id: Ie4877199cde3faa035b427b3d3f3ac07ac08aa85
diff --git a/build-deploy.sh b/build-deploy.sh
index 10d126e..0bf8cf3 100644
--- a/build-deploy.sh
+++ b/build-deploy.sh
@@ -20,7 +20,7 @@
 
 for d in cmd/*
 do
-  go build -ldflags "-X main.Version=$VERSION"  -o ${out}/$(basename $d) github.com/google/zoekt/$d
+  go build -tags netgo -ldflags "-X main.Version=$VERSION"  -o ${out}/$(basename $d) github.com/google/zoekt/$d
 done
 
 cat <<EOF > ${out}/deploy.sh