internal/licenses: accept CECILL-2.1

For golang/go#52126.

Change-Id: I4f9b3e8cd3b2d15ce7be68fe9a5e77017d350866
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/399355
Run-TryBot: Jamal Carvalho <jamal@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Auto-Submit: Jamal Carvalho <jamal@golang.org>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
diff --git a/internal/licenses/licenses.go b/internal/licenses/licenses.go
index 0ec4105..f8ac464 100644
--- a/internal/licenses/licenses.go
+++ b/internal/licenses/licenses.go
@@ -151,6 +151,7 @@
 		"CC-BY-4.0",
 		"CC-BY-SA-3.0",
 		"CC-BY-SA-4.0",
+		"CECILL-2.1",
 		"CC0-1.0",
 		"EPL-1.0",
 		"EPL-2.0",
diff --git a/tests/screentest/testdata/license-policy-540x1080.a.png b/tests/screentest/testdata/license-policy-540x1080.a.png
index 8b75d1c..78c046f 100644
--- a/tests/screentest/testdata/license-policy-540x1080.a.png
+++ b/tests/screentest/testdata/license-policy-540x1080.a.png
Binary files differ
diff --git a/tests/screentest/testdata/license-policy.a.png b/tests/screentest/testdata/license-policy.a.png
index c186346..cb397ae 100644
--- a/tests/screentest/testdata/license-policy.a.png
+++ b/tests/screentest/testdata/license-policy.a.png
Binary files differ