Attempt to change submodule of lua to use lua 5.1

.gitmodules

@@ -7,3 +7,7 @@
 [submodule "dependencies/luabind"]
 	path = dependencies/luabind
 	url = git://github.com/LuaDist/luabind.git
+[submodule "dependencies/dependencies/lua"]
+	path = dependencies/dependencies/lua
+	url = git://github.com/LuaDist/lua.git
+	branch = lua-5.1

dependencies/dependencies/lua

@@ -0,0 +1 @@
+Subproject commit d2e7e7d4d43ff9068b279a617c5b2ca2c2771676