swift

c8e74b83 - Generic specialization: change the mangling for dropped metatype arguments

Generic specialization: change the mangling for dropped metatype arguments Instead of adding a "flag" (`m` in `...Tgm5`) make it more generic to allow to drop any unused argument. Add all dropped arguments with a `t<n-1>` (where `<n-1>` is empty for n === 0). For example `...Ttt2g5`.