Fix distribution of rockspec source.
Fix distribution of rockspec source.

jimmyharris/luaposix,zevv/luaposix,jimmyharris/luaposix,zevv/luaposix,luaposix/luaposix,snegovick/luaposix,rrthomas/luaposix,ardje/luaposix,rrthomas/luaposix,ardje/luaposix,snegovick/luaposix