Put tests under public domain

Not created by myself and therefore exempt: test/cpp2008/6-4-4.cpp

The public domain note is from the Firebird project and got adapted by me:
 * http://firebirdsql.org/manual/migration-mssql-pdnotice.html

test-wishlist/LICENSE.TXT

@@ -0,0 +1,9 @@
+If not stated differently, all files in this folder and sub-folders have been
+put in the Public Domain by its author(s), thereby relinquishing all copyrights.
+Everyone is free to use, modify, republish, sell or give away this work without
+prior consent from anybody.
+
+This documentation is provided on an “as is” basis, without warranty of any
+kind. Use at your own risk! Under no circumstances shall the author(s) or
+contributor(s) be liable for damages resulting directly or indirectly from the
+use or non-use of this documentation.

test/LICENSE.TXT

@@ -0,0 +1,9 @@
+If not stated differently, all files in this folder and sub-folders have been
+put in the Public Domain by its author(s), thereby relinquishing all copyrights.
+Everyone is free to use, modify, republish, sell or give away this work without
+prior consent from anybody.
+
+This documentation is provided on an “as is” basis, without warranty of any
+kind. Use at your own risk! Under no circumstances shall the author(s) or
+contributor(s) be liable for damages resulting directly or indirectly from the
+use or non-use of this documentation.

test/cpp2008/6-4-4.cpp

@@ -1,3 +1,4 @@
+// Developed and copyright by: bansan85 <[email protected]>
 // RUN: %python %S/../check_clang_tidy.py %s misra-cpp2008-6-4-4 %t
 void compliant(int a) {
   switch (a) {