PHLEGM v9 r62 - Executable architecture in native window captions

Architecture detection comes from FreeBASIC's __FB_64BIT__ compile-time flag.
32-bit executable: x86.  64-bit executable: x64.
This refers to the executable, NOT the host OS architecture or GPU backend.

Control window examples:
  Phlegmulator v9 r62 [x86]
  Phlegmulator v9 r62 [x64]

Machine display window examples:
  Phlegmulator v9 r62 - nintendo / SNES-NTSC - Primary [x86 / D3D11]
  Phlegmulator v9 r62 - nintendo / SNES-NTSC - Primary [x64 / OpenGL]
  Phlegmulator v9 r62 - nintendo / SNES-NTSC - Primary [x64 / Vulkan]

Supported hosts: Windows GUI + SDL machine display; Linux GTK GUI + SDL
machine display. Preserve existing version/revision/machine/monitor naming.
No emulation timing, frame-skip, renderer, or compiler performance change.

Verification: tests/Window-Title-Architecture-r62.Tests.sh (source regression).
Native x86/x64 compilation and runtime smoke tests remain to be performed.
