regenerate python protobuf files

Change-Id: I8794d5ea5dbbb174fd82d54c18969c7d6e6a954e
diff --git a/build-python.sh b/build-python.sh
index cb020e8..ce5bf37 100755
--- a/build-python.sh
+++ b/build-python.sh
@@ -12,5 +12,6 @@
 
 python -m compileall .
 
+# modify any import statements (to remove subdir path)
 protoc -I=proto --python_out=proto proto/AndroidSystemControlMessage.proto
 protoc -I=proto --python_out=proto proto/InterfaceSpecificationMessage.proto