LICENSE: mention the license of CI scripts

ldv-alt · solardiz · commit 4f431426b9ac · 2021-03-16T13:23:10.000+01:00
These scripts were derived from very similar CI scripts maintained by
strace project, they are provided under the terms of the GNU General
Public License version 2 or later.
diff --git a/LICENSE b/LICENSE
@@ -5,6 +5,10 @@ concat.c, wordset_4k.c, wordset_4k.h, pam_macros.h, and pwqcheck.php
 are in the public domain, but at your option they may also be used under
 this package's license below.
 
+Files in ci directory (install-dependencies.sh and run-build-and-tests.sh)
+are provided under the terms of the GNU General Public License version 2 or
+later.  These files are not included into archives generated by git-archive.
+
 The rest of the files in this package fall under the following terms
 (heavily cut-down "BSD license"):
 
