Update games/wesnoth to 1.12.5.

Changes:
Version 1.12.5:
* Campaigns:
  * Eastern Invasion:
    * Fixed scenario events not working right on easy difficulty in 'Captured'.
  * Legend of Wesmere
    * Fixed carryover bugs in scenarios 5-12.
      (units missing from carryover, units appearing twice on map...)
* Editor:
  * Add Recent Files menu with a list of recently saved or loaded maps or
    scenarios, up to a custom limit (by default 10) that can be set in
    Advanced Preferences.
  * Fixed Player Start labels not being updated with repeat map generations
    (bug #20036)
* Language and i18n:
  * Updated translations: British English, French, Hungarian, Japanese,
    Latvian, Polish, Portuguese, Scottish Gaelic, Spanish
  * Fixed crashes during start-up on Windows resulting from add-ons containing
    erroneous textdomain declarations (bug #23839).
* Multiplayer:
  * Era names no longer support formatting markup in the game setup screen.
  * Made MP lobby filter option filter on eras and mods too (bug #22987).
  * Fix scenario ending to early for players that are defeated if there are
    still players fighting and victory_when_enemies_defeated=no.
  * Fix 'enemies defeated' event causing OOS error in mp scenarios.
* Terrains:
  * Removed unit elevation from N-S hanging bridges
  * Added unit elevation to NW-SE and SW-NE stone chasm bridges
  * Added unit elevation to NW-SE and SW-NE plank bridges
  * Hanging, stone chasm, and plank bridges are now displayed in-game simply
    as "Bridge", retaining their descriptive names in the editor as per
    convention.
  * Fixed spurious "could not open image 'terrain/.png'" error messages caused
    by terrains without a minimap image (symbol_image) such as those from the
    Special category in the editor (Impassable Overlay, etc.).
* User interface:
  * Force uniform font rendering settings across X11 and Apple OS X, avoiding
    color glitches resulting from incorrect applications of subpixel hinting
    (bug #20337).
* WML engine:
  * Added WML menu item and event handler views to the Gamestate Inspector
    dialog.
  * Removed y offset by -1 from [message]'s scroll-to-unit logic.
* Miscellaneous and bug fixes:
  * Default to non-strict compilation with CMake.
  * Fixed strict compilation with clang 3.5 and 3.6.
  * Fixed strict compilation with gcc 5.
  * Fixed unbound memory read in internal time formatting code with
    specially-crafted input.
  * Fixed RECRUIT_UNIT_VARIATIONS core WML macro leaking an internal temporary
    variable ($recruited_unit_random_variation).
  * Fixed unit [resistance] and [jamming_costs] not being considered for sync
    check.
  * Fixed OOS on random maps, where clients placed sides in different castles.
  * Several fixes to the handling of key combinations including
    non-alphanumeric keys (Enter, Tab, F1-F12, etc.), especially relevant for
    assigning custom hotkeys to actions in Preferences.
  * Fixed broken Oasis terrain help entry (bug #23023)
  * Fixed hang when attempting to make a screenshot from a non-existent map via
    command-line (bug #20900)
  * Fixed cases of wrong unit type used in planning moves (bug #20299)
  * Avoid crash when planning moves on planned recruits (bug #18637)

(leot)