tests: Add NetBSD image

The image is prepared following instructions as in:

https://wiki.qemu.org/Hosts/BSD

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Kamil Rytarowski <n54@gmx.com>

tests/vm/netbsd

@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+#
+# NetBSD VM image
+#
+# Copyright 2017 Red Hat Inc.
+#
+# Authors:
+#  Fam Zheng <famz@redhat.com>
+#
+# This code is licensed under the GPL version 2 or later.  See
+# the COPYING file in the top-level directory.
+#
+
+import os
+import sys
+import subprocess
+import basevm
+
+class NetBSDVM(basevm.BaseVM):
+    name = "netbsd"
+    BUILD_SCRIPT = """
+        set -e;
+        cd $(mktemp -d /var/tmp/qemu-test.XXXXXX);
+        tar -xf /dev/rld1a;
+        ./configure --python=python2.7 {configure_opts};
+        gmake -j{jobs};
+        gmake check;
+    """
+
+    def build_image(self, img):
+        cimg = self._download_with_cache("http://download.patchew.org/netbsd-7.1-amd64.img.xz",
+                                         sha256sum='b633d565b0eac3d02015cd0c81440bd8a7a8df8512615ac1ee05d318be015732')
+        img_tmp_xz = img + ".tmp.xz"
+        img_tmp = img + ".tmp"
+        subprocess.check_call(["cp", "-f", cimg, img_tmp_xz])
+        subprocess.check_call(["xz", "-df", img_tmp_xz])
+        if os.path.exists(img):
+            os.remove(img)
+        os.rename(img_tmp, img)
+
+if __name__ == "__main__":
+    sys.exit(basevm.main(NetBSDVM))