give back plastimatch

[Mathieu Malaterre <malat@debian.org>]

Please give back plastimatch:

gb plastimatch_1.5.11+dfsg0-1 . i386

insighttoolkit 3.20.1+git20120521-3 was uploaded to fix an issue with
a new behavior with gcc 4.7.0 and signaling NaN on i386 (#682805)

Thanks