Steam on Linux moves to 64-bit client

A Steam Client Beta update made the main Linux build a 64-bit application, giving the client expanded memory access and better security. The client now runs inside its own Steam Runtime container, though 32-bit libraries and graphics drivers are still required.

• Steam's main Linux binary is now 64-bit, matching steamwebhelper
• The client runs in a Steam Runtime container for consistency across distros
• 32-bit libraries and graphics drivers are still required for compatibility
• The beta adds Steam Achievement Sets, supported by Left 4 Dead 2 and Portal 2