Log Message:
devel/ruby-ffi: update to 1.12.1

Update ruby-ffi to 1.12.1.

1.12.1 / 2020-01-14
-------------------

Added:
* Add binary gem support for ruby-2.7 on Windows

1.12.0 / 2020-01-14
-------------------

Added:
* FFI::VERSION is defined as part of `require 'ffi'` now.
  It is no longer necessary to `require 'ffi/version'` .

Changed:
* Update libffi to latest master.

Deprecated:
* Overwriting struct layouts is now warned and will be disallowed in ffi-2.0. \ 
#734, #735

1.11.3 / 2019-11-25
-------------------

Removed:
* Remove support for tainted objects which cause deprecation warnings in \ 
ruby-2.7. #730

1.11.2 / 2019-11-11
-------------------

Added:
* Add DragonFlyBSD as a platform. #724

Changed:
* Sort all types.conf files, so that files and changes are easier to compare.
* Regenerated type conf for freebsd12 and x86_64-linux targets. #722
* Remove MACOSX_DEPLOYMENT_TARGET that was targeting very old version 10.4. #647
* Fix library name mangling for non glibc Linux/UNIX. #727
* Fix compiler warnings raised by ruby-2.7
* Update libffi to latest master.