qt: Add LogQtInfo() function
Summary:
Add information to debug log about Qt, the OS, the screens.
This is a backport of Core PR17826
Test Plan:
$ ninja && src/qt/bitcoin-qt -regtest -printtoconsole | head -n6 [219/219] Linking CXX executable src/qt/bitcoin-qt 2020-11-13T15:28:52Z Bitcoin ABC version v0.22.7-3ba582bc3 (release build) 2020-11-13T15:28:52Z Qt 5.12.8 (dynamic), plugin=xcb (dynamic) 2020-11-13T15:28:52Z System: Ubuntu 20.04.1 LTS, x86_64-little_endian-lp64 2020-11-13T15:28:52Z Screen: DVI-I-1 1920x1080, pixel ratio=1.0 2020-11-13T15:28:52Z Screen: DVI-D-1 1920x1080, pixel ratio=1.0 2020-11-13T15:28:53Z Checkpoints will be verified.
Reviewers: #bitcoin_abc, deadalnix
Reviewed By: #bitcoin_abc, deadalnix
Differential Revision: https://reviews.bitcoinabc.org/D8393