$OpenBSD: patch-Makefile_in,v 1.11 2021/11/14 15:25:18 sthen Exp $

not very useful without tools, and the contrib Makefile has a gnu-ism

Index: Makefile.in
--- Makefile.in.orig
+++ Makefile.in
@@ -465,7 +465,7 @@ top_srcdir = @top_srcdir@
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 SUBDIRS = lib third-party src bpf examples python tests integration-tests \
-	doc contrib script
+	doc script
 
 
 # Now with python setuptools, make uninstall will leave many files we
