Remove the unused server_sem variable.

This way it still works if the libdir we got was libs/wine instead of libs.

I initially misread the specification.  src0.x is the iteration count,
not the max amount for the loop register.  This fixes that.

- Separate the declaration phase of the shader string generator into
  the arb and glsl specific files.
- Add declarations and recognition for application-sent constant
  integers and booleans (locally defined ones will follow).
- Standardize capitilization of pixel/vertex specific variable names.

- Moves GLSL constant loading code into glsl_shader.c and out of the
  over-populated drawprim.c.
- Creates a new file named arb_program_shader.c which will hold code
  specific to ARB_vertex_program & ARB_fragment_program.
- Remove the constant loading calls from drawprim.c

(vertical scrollbar position was not taken into account).