st/mesa/glsl/i965: set num_ssbos directly in shader_info

Here we also remove the duplicate field in gl_linked_shader and always
get the value from shader_info instead.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/compiler/glsl/link_uniforms.cpp

@@ -901,7 +901,7 @@ link_update_uniform_buffer_variables(struct gl_linked_shader *shader,
              var->data.mode == ir_var_shader_storage);
 
       unsigned num_blocks = var->data.mode == ir_var_uniform ?
-         shader->Program->info.num_ubos : shader->NumShaderStorageBlocks;
+         shader->Program->info.num_ubos : shader->Program->info.num_ssbos;
       struct gl_uniform_block **blks = var->data.mode == ir_var_uniform ?
          shader->Program->sh.UniformBlocks : shader->ShaderStorageBlocks;