testing/ldc: Update to 1.20.0
All of the fixes made to upstream for Musl are now integrated. However, it turned out that enable ldc on non-x86_64 was not trivial, and it's not something I'm going to pursue in the near future.
All of the fixes made to upstream for Musl are now integrated. However, it turned out that enable ldc on non-x86_64 was not trivial, and it's not something I'm going to pursue in the near future.