[babl] export-symbols: add babl_chromatic_adaptation_matrix

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 72a61be810c74a9b7293670f540da126748aa9f6
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Oct 28 23:49:54 2021 +0200

    export-symbols: add babl_chromatic_adaptation_matrix

 export-symbols | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/export-symbols b/export-symbols
index 82269f5aa..420ef87b2 100644
--- a/export-symbols
+++ b/export-symbols
@@ -3,6 +3,7 @@ babl_component_new
 babl_conversion_get_destination_space
 babl_conversion_get_source_space
 babl_conversion_new
+babl_chromatic_adaptation_matrix
 babl_cpu_accel_get_support
 babl_exit
 babl_fast_fish