avoid using AQ which is untuned for screen route
Merge pull request #1081 from sijchen/scc_param_valid

avoid using AQ which is untuned for screen route
Enable whole program optimization for both decoder and encoder MSVC projects

Enable it on the project level, instead of having to set separate options
for both compiler and linker.

The processing project actually had the options set in this way originally
as well.
Merge pull request #1082 from mstorsjo/msvc-ltcg

Enable whole program optimization for both decoder and encoder MSVC projects