add a recipe for libuv

[abirbasak]

Please add a recipe for libuv. A cmake for that can be found here https://github.com/dacap/libuv-cmake . Can't directly use cgate install dacap/libuv-cmake , as the git download doesn't download the project included by git submodule. Likely after downloading , need to parse .gitmodules , & download the submodules in the respective directory. This is problem for any projects which uses git submodule. e.g. cget install Cylix/netflex@master

[pfultz2]

That cmake file doesn't install libuv. So even adding it to the recipe, the cmake file won't work.