LDC 1.12.0

[kinke]

Glad to announce LDC 1.12:

* Based on D 2.082.1.
* Support for LLVM 7, which is used for the prebuilt packages.
   Due to an LLVM 7.0.0 regression, the prebuilt x86[_64] LDC 
binaries
   require a CPU with SSSE3.
* LTO working for Win64 targets.
* IR-based PGO working for Windows targets.
* New, Easy::jit-like interface for dynamic/JIT compilation.
* Experimental support for Android/x86_64.

Full release log and downloads: 
https://github.com/ldc-developers/ldc/releases/tag/v1.12.0

Thanks to all contributors!