lua_source_ddf.proto missing from defoldsdk.zip

[JustAPotota]

Describe the bug (REQUIRED)
lua_source_ddf.proto is missing from the defoldsdk.zip downloads.

To Reproduce (REQUIRED)

1. Download defoldsdk.zip from one of the latest releases (e.g. the one from 1.8.0)
2. Extract it
3. Try to compile the .proto files

Expected behavior (REQUIRED)
It should include all protobuf definitions.

Defold version (REQUIRED):
Tested just now with 1.8.0 and 1.7.0. I remember this happening with previous versions too.

Logs (OPTIONAL):

$ cd defoldsdk/share/proto
$ protoc --python_out=../py ./**/*

script/lua_source_ddf.proto: File not found.
gameobject/properties_ddf.proto:4:1: warning: Import ddf/ddf_extensions.proto is unused.
gameobject/properties_ddf.proto:5:1: warning: Import ddf/ddf_math.proto is unused.
gameobject/lua_ddf.proto:7:1: Import "script/lua_source_ddf.proto" was not found or had errors.
gameobject/lua_ddf.proto:18:14: "LuaSource" is not defined.
engine/engine_ddf.proto:7:1: Import "gameobject/lua_ddf.proto" was not found or had errors.
engine/engine_ddf.proto:26:14: "dmLuaDDF.LuaModule" is not defined.

Workaround (OPTIONAL):
Manually downloading lua_source_ddf.proto or using the precompiled header files in the SDK.