Exclude coverity_model.c and matio_test_cases.m from Coveralls
Exclude coverity_model.c and matio_test_cases.m from Coveralls

[ci skip]

MaartenBent/matio,MaartenBent/matio,NJannasch/matio,tbeu/matio,MaartenBent/matio,tbeu/matio,tbeu/matio,tbeu/matio,NJannasch/matio,MaartenBent/matio