package/boost: annotate _IGNORE_CVES for CVE-2009-3654

package/boost: annotate _IGNORE_CVES for CVE-2009-3654

This CVE does not affect the boost package, but is misclassified by our
CVS tracker. As per the advisory:

    Unspecified vulnerability in Boost before 6.x-1.03, a module for
    Drupal, allows remote attackers to create new webroot directories
    via unknown attack vectors.

Ignore the CVS, and expand a comment to explain it.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[yann.morin.1998@free.fr: expand the comment]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>