Log Message:
ruby-mini_portile2: update to 2.8.4.

Upstream changes:
 https://github.com/flavorjones/mini_portile/releases/tag/v2.8.4
 https://github.com/flavorjones/mini_portile/releases/tag/v2.8.3

2.8.4 / 2023-07-18

* cmake: set CMAKE compile flags to configure cross-compilation similarly to
  autotools --host flag: SYSTEM_NAME, SYSTEM_PROCESSOR, C_COMPILER, and
  CXX_COMPILER. [#130] (Thanks, @stanhu!)

2.8.3 / 2023-07-18

Fixed

 * cmake: only use MSYS/NMake generators when available. [#129] (Thanks,
   @stanhu!)