devel/electron12: update to 12.2.2

While here, mark as BROKEN on i386. Build on i386 fails with the error
"LLVM ERROR: out of memory" while linking
v8_context_snapshot_generator.

Changelog:

• https://github.com/electron/electron/releases/tag/v12.0.10
• https://github.com/electron/electron/releases/tag/v12.0.11
• https://github.com/electron/electron/releases/tag/v12.0.12
• https://github.com/electron/electron/releases/tag/v12.0.13
• https://github.com/electron/electron/releases/tag/v12.0.14
• https://github.com/electron/electron/releases/tag/v12.0.15
• https://github.com/electron/electron/releases/tag/v12.0.16
• https://github.com/electron/electron/releases/tag/v12.0.17
• https://github.com/electron/electron/releases/tag/v12.0.18
• https://github.com/electron/electron/releases/tag/v12.1.0
• https://github.com/electron/electron/releases/tag/v12.1.1
• https://github.com/electron/electron/releases/tag/v12.1.2
• https://github.com/electron/electron/releases/tag/v12.2.0
• https://github.com/electron/electron/releases/tag/v12.2.1
• https://github.com/electron/electron/releases/tag/v12.2.2