Add CVE for #71912 (PHP 5.5.35, 5.6.21 and 7.0.6)

Author: kaplanlior

ChangeLog-5.php

@@ -34,7 +34,7 @@
 <li>GD:
 <ul>
   <li><?php bugfix(71952); ?> (Corruption inside imageaffinematrixget).</li>
-  <li><?php bugfix(71912); ?> (libgd: signedness vulnerability).</li>
+  <li><?php bugfix(71912); ?> (libgd: signedness vulnerability). (CVE-2016-3074)</li>
 </ul></li>
 <li>Intl:
 <ul>
@@ -90,7 +90,7 @@
 </ul></li>
 <li>GD:
 <ul>
-  <li><?php bugfix(71912); ?> (libgd: signedness vulnerability).</li>
+  <li><?php bugfix(71912); ?> (libgd: signedness vulnerability). (CVE-2016-3074)</li>
 </ul></li>
 <li>Intl:
 <ul>