[backport][msbuild] Skip reference assemblies passed to mtouch (#3791)#3889

spouliot merged 1 commit intodotnet:d15-7dotnet/macios:d15-7from

VincentDondain:d15-7-backport-fix-issue-3199VincentDondain/xamarin-macios:d15-7-backport-fix-issue-3199Copy head branch name to clipboard