Try to exclude clang from coverage.
Try to exclude clang from coverage.

Seems like the version travis uses doesn't support coverage properly:

http://llvm.org/bugs/show_bug.cgi?id=15953

JoakimSoderberg/libws,JoakimSoderberg/libws,couchbasedeps/libws,couchbasedeps/libws,couchbasedeps/libws,JoakimSoderberg/libws