Move all known SceLibc variable exports to the variables section.
Move all known SceLibc variable exports to the variables section.

Also moved 1 SceLibstdcxx variable to the variables section.

Rinnegatamante/vita-headers,vitasdk/vita-headers,Rinnegatamante/vita-headers,Rinnegatamante/vita-headers,vitasdk/vita-headers,vitasdk/vita-headers,Rinnegatamante/vita-headers,vitasdk/vita-headers