Add a python-wrapped opencv, complete with SIFT support

Change-Id: I06cd05a8974670fb886123ef24e4c44c2a985362
diff --git a/debian/opencv_python.BUILD b/debian/opencv_python.BUILD
new file mode 100644
index 0000000..5afa180
--- /dev/null
+++ b/debian/opencv_python.BUILD
@@ -0,0 +1,10 @@
+py_library(
+    name = "python_opencv",
+    srcs = glob(["**/*.py"]),
+    data = glob(
+        include = ["**/*"],
+        exclude = ["**/*.py"],
+    ),
+    imports = ["."],
+    visibility = ["//visibility:public"],
+)