lgogdownloader is a dependency of T5140. This commit adds
all files necessary to build it, except for a couple libraries
D2719 and D2720.
I built lgogdownloader locally and am able to run it without issue.
Please use the stack (child & parent revision in sidebar) / "Depends on D#" support to create a stack so there is a clear path on what needs to land first, correctly.
Closing due to lack of response.