games/moonlight-qt: Backport upstream commits and improve port

Make some small changes to port Makefile

Backport following commits:
1fd545ae1fea80179d8ac7addfd4cae48554bc63
4ec549650dc3f976847e1592f970f36448a3b36f
13880353d8741ae331bf13433c5ad80071d5f44f
6ce02616f04fb83cd7c5d1492b03367f2220ac46

References:
https://github.com/moonlight-stream/moonlight-qt/commit/1fd545ae1fea80179d8ac7addfd4cae48554bc63
https://github.com/moonlight-stream/moonlight-qt/commit/4ec549650dc3f976847e1592f970f36448a3b36f
https://github.com/moonlight-stream/moonlight-qt/commit/13880353d8741ae331bf13433c5ad80071d5f44f
https://github.com/moonlight-stream/moonlight-qt/commit/6ce02616f04fb83cd7c5d1492b03367f2220ac46

PR: 297357