Fix T31546 fragment program gets created every frame

That was really crappy indeed. Now we have a separate API
for low level OpenGL programs, plus a nice interface for GPU, also
removes some GL calls from main code as a plus :)

The source for the programs is also moved to nice external .glsl files
(not sure which extension convention GPU assemply uses)

SConstruct

@@ -758,6 +758,9 @@ if B.targets != ['cudakernels']:
     data_to_c_simple("release/datafiles/preview_cycles.blend")
 
     # --- glsl ---
+    data_to_c_simple("source/blender/gpu/shaders/gpu_program_smoke_frag.glsl")
+    data_to_c_simple("source/blender/gpu/shaders/gpu_program_smoke_color_frag.glsl")
+
     data_to_c_simple("source/blender/gpu/shaders/gpu_shader_simple_frag.glsl")
     data_to_c_simple("source/blender/gpu/shaders/gpu_shader_simple_vert.glsl")
     data_to_c_simple("source/blender/gpu/shaders/gpu_shader_material.glsl")