Add parameter types to druntime functions
fix Issue 10727 - Regression (dmd-2.061) -- DMD dumps core

Implicit identity assignment check introduced from 2.061 (instantiate opAssign under error gagging) had gagged undefined identifier error.
Merge pull request #2420 from 9rnsr/fix10727

[REG2.061] Issue 10727 - DMD dumps core
Merge pull request #2414 from AlexeyProkhin/cfuncsignatures

[LDC] Add parameters to druntime functions
Work around ugly PULL93 `#if`s
Merge pull request #2426 from yebblies/ifdef3

[DDMD] Work around ugly PULL93 `#if`s