$NetBSD$

Add support for *BSD.

--- bundles/pyml/Makefile.orig	2019-09-25 09:19:54.000000000 +0000
+++ bundles/pyml/Makefile
@@ -30,6 +30,8 @@ else ifeq ($(ARCH),Darwin)
 	PYML_ARCH=pyml_arch_darwin.ml
 else ifeq ($(findstring CYGWIN,$(ARCH)),CYGWIN)
 	PYML_ARCH=pyml_arch_cygwin.ml
+else ifeq ($(findstring BSD,$(ARCH)),BSD)
+	PYML_ARCH=pyml_arch_linux.ml
 else
 	$(error Unsupported OS $(ARCH)
 endif
