clang-11 missing dependency to libstdc++11

Just a slight bug report for clang-11 package
A very recent upgrade caused clang-11 to not work out anymore. Turns out it depends on libstdc++11 which is not part of it’s dependencies. After manually installing it everything clang worked out again.

BR

Hello! Thank you for your report i’m telling Palinuro. HOpefully he won’t forget about thsi bug