pidgin/pidgin

Fix broken `make check`.

2014-11-10, Elliott Sales de Andrade
b8fc1815b365
Fix broken `make check`.

One of the renamed files was not changed in POTFILES.skip.
How to build Pidgin for Windows using MinGW
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For the latest build instructions, please refer to:
https://developer.pidgin.im/wiki/BuildingWinPidgin