PROTON-1383: [C++ binding] Add #include that seems to be needed by SunPro compiler
PROTON-1383: [C++ binding] Add #include that seems to be needed by SunPro compiler

ChugR/qpid-proton,ChugR/qpid-proton,alanconway/qpid-proton,kgiusti/qpid-proton,astitcher/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,ssorj/qpid-proton,apache/qpid-proton,apache/qpid-proton,ChugR/qpid-proton,astitcher/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,gemmellr/qpid-proton,kgiusti/qpid-proton,astitcher/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,alanconway/qpid-proton,alanconway/qpid-proton,gemmellr/qpid-proton,apache/qpid-proton,gemmellr/qpid-proton,ssorj/qpid-proton,astitcher/qpid-proton,ssorj/qpid-proton,ssorj/qpid-proton,astitcher/qpid-proton,alanconway/qpid-proton,alanconway/qpid-proton,ssorj/qpid-proton,gemmellr/qpid-proton,alanconway/qpid-proton,ChugR/qpid-proton,ssorj/qpid-proton,gemmellr/qpid-proton,kgiusti/qpid-proton,astitcher/qpid-proton,gemmellr/qpid-proton,ChugR/qpid-proton,ChugR/qpid-proton