Fixes https://issues.infn.it/jira/browse/VOMS-507
Since we now link to libgsoapssl++ we need soapC.cpp instead of soapC.c
Merge pull request #13 from ellert/fix/VOMS-507

Since we now link to libgsoapssl++ we need soapC.cpp instead of soapC.c
Merge pull request #16 from italiangrid/fix/VOMS-507

Fix/voms 507