glsl: rename get_record_instance() -> get_struct_instance()

Replace done using:
find ./src -type f -exec sed -i -- \
's/get_record_instance(/get_struct_instance(/g' {} \;

Acked-by: Karol Herbst <kherbst@redhat.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>

src/compiler/glsl/tests/array_refcount_test.cpp

@@ -477,7 +477,7 @@ TEST_F(array_refcount_test, do_not_process_array_inside_structure)
    };
 
    const glsl_type *const record_of_array_3_of_int =
-      glsl_type::get_record_instance(fields, ARRAY_SIZE(fields), "S");
+      glsl_type::get_struct_instance(fields, ARRAY_SIZE(fields), "S");
 
    ir_variable *var_a = new(mem_ctx) ir_variable(glsl_type::int_type,
                                                  "a",