add dll-linux.html
Merge pull request #375 from WalterBright/add-dll-linux

add dll-linux.html
Fix issue 11001 - Add documentation for __traits(getVirtualIndex).
Merge pull request #378 from Kapps/fix11001

Fix issue 11001 - Add documentation for __traits(getVirtualIndex).
add link to core_demangle.html
Merge pull request #379 from dawgfoto/addCoreDemangle

add link to core_demangle.html