Add git submodule for lua-cjson.

Reference commit 4bc5e917c8cd5fc2f6b217512ef530007529322f (2.1.0 tag, stable).

Add git submodule for lua-cjson.
8e03cec0 · Konstantin Osipov · 716475e4 · 8e03cec0 · 4bc5e917
Commit 8e03cec0 authored 11 years ago by Konstantin Osipov
--- a/.gitmodules
+++ b/.gitmodules
+[submodule "third_party/lua-cjson"]
+	path = third_party/lua-cjson
+	url = git://github.com/mpx/lua-cjson.git
--- a/lua-cjson @ 4bc5e917
+++ b/lua-cjson @ 4bc5e917
+Subproject commit 4bc5e917c8cd5fc2f6b217512ef530007529322f