Expand QCMS tests. Add Munsell test for transform accuracy

third_party/qcms/src/transform.c

Index: third_party/qcms/src/transform.c
diff --git a/third_party/qcms/src/transform.c b/third_party/qcms/src/transform.c
index cbdfa5935b4ea2dbea75ea4b6c89bd717bf13e6f..45032ed06a198d05b97627256070bf47d9c6343c 100644
--- a/third_party/qcms/src/transform.c
+++ b/third_party/qcms/src/transform.c
@@ -411,7 +411,7 @@ static void qcms_transform_data_rgb_out_lut_precache(qcms_transform *transform,
 	}
 }
 
-static void qcms_transform_data_rgba_out_lut_precache(qcms_transform *transform, unsigned char *src, unsigned char *dest, size_t length, qcms_format_type output_format)
+void qcms_transform_data_rgba_out_lut_precache(qcms_transform *transform, unsigned char *src, unsigned char *dest, size_t length, qcms_format_type output_format)
 {
 	const int r_out = output_format.r;
 	const int b_out = output_format.b;