nir/linker: Set the uniform initial values

This is based on link_uniform_initializers.cpp.

v2: move from compiler/nir to compiler/glsl (Timothy Arceri)

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/compiler/glsl/gl_nir_linker.h

@@ -34,6 +34,9 @@ struct gl_shader_program;
 bool gl_nir_link_uniforms(struct gl_context *ctx,
                           struct gl_shader_program *prog);
 
+void gl_nir_set_uniform_initializers(struct gl_context *ctx,
+                                     struct gl_shader_program *prog);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif