LDC 1.10.0 beta

[kinke]

LDC 1.10.0-beta2 is out now, based on recent DMD stable and with 
these main changes since beta1:

* Cross-compilation-friendly LDC config file extensions.
* Fix std.math compile error regressions for ARM, AArch64, MIPS, 
etc.
* Fix LDC compile errors on 64-bit macOS with DMD >= 2.079.
* Fix sporadic front-end crashes.
* Win64 ABI:
   * Breaking change for extern(D): vectors now passed directly in 
registers.
   * Fix for extern(C++) wrt. small non-PODs passed by value.

Full release log and downloads:
https://github.com/ldc-developers/ldc/releases/tag/v1.10.0-beta2