This patch includes:
1. CustomTarget to build and place the LibreOffice.Bindings NuGet
package in <sdk>/dotnet/
2. net_bridge (.NET library) to declare bootstrap() on the C# side,
and net_bootstrap (C++ library) to wrap bootstrap() on the native side
3. Changes to LO SDK scripts to find .NET SDK and DOTNET_ROOT on the
users machine
Change-Id: Ia29ae56a2ad0f808f1563ef6167a3bd7c476642e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170172
Tested-by: Jenkins
Reviewed-by: Hossein <hossein@libreoffice.org>
074714fab8