Also look for the '_static' suffix when searching for libjsoncpp.a (#1635)
Also look for the '_static' suffix when searching for libjsoncpp.a (#1635)

*Motivation*

Newer versions of Homebrew have the JSONCpp static library installed as libjsoncpp_static.a
massakam/pulsar,nkurihar/pulsar,merlimat/pulsar,ArvinDevel/incubator-pulsar,massakam/pulsar,jai1/pulsar,jai1/pulsar,nkurihar/pulsar,jai1/pulsar,yahoo/pulsar,jai1/pulsar,yahoo/pulsar,ArvinDevel/incubator-pulsar,merlimat/pulsar,massakam/pulsar,massakam/pulsar,nkurihar/pulsar,nkurihar/pulsar,yahoo/pulsar,jai1/pulsar,ArvinDevel/incubator-pulsar,jai1/pulsar,ArvinDevel/incubator-pulsar,merlimat/pulsar,merlimat/pulsar,massakam/pulsar,nkurihar/pulsar,ArvinDevel/incubator-pulsar,massakam/pulsar,ArvinDevel/incubator-pulsar,ArvinDevel/incubator-pulsar,yahoo/pulsar,nkurihar/pulsar,ArvinDevel/incubator-pulsar,nkurihar/pulsar,nkurihar/pulsar,nkurihar/pulsar,merlimat/pulsar,jai1/pulsar,merlimat/pulsar,yahoo/pulsar,yahoo/pulsar,jai1/pulsar,jai1/pulsar