NO-JIRA: default to universal binaries on Mac OS X
NO-JIRA: default to universal binaries on Mac OS X

The system-installed Perl, Python etc. are all built as universal
binaries on Mac and so we need to build libqpid-proton to similarly
contain both architectures. This allows the bindings to link
successfully.

clemensv/qpid-proton,ChugR/qpid-proton,clemensv/qpid-proton,Azure/qpid-proton,Karm/qpid-proton,clemensv/qpid-proton,datawire/qpid-proton,kgiusti/qpid-proton,gemmellr/qpid-proton,apache/qpid-proton,clemensv/qpid-proton,alanconway/qpid-proton,RobertoMalatesta/qpid-proton,bozzzzo/qpid-proton,ChugR/qpid-proton,astitcher/qpid-proton,gemmellr/qpid-proton-j,datawire/qpid-proton,bozzzzo/qpid-proton,gemmellr/qpid-proton,RobertoMalatesta/qpid-proton,wprice/qpid-proton,wprice/qpid-proton,Karm/qpid-proton,Karm/qpid-proton,ssorj/qpid-proton,kgiusti/qpid-proton,Azure/qpid-proton,kgiusti/qpid-proton,clemensv/qpid-proton,astitcher/qpid-proton,FlaPer87/qpid-proton,Azure/qpid-proton,FlaPer87/qpid-proton,RobertoMalatesta/qpid-proton,wprice/qpid-proton,astitcher/qpid-proton,prestona/qpid-proton,Karm/qpid-proton,Karm/qpid-proton,clemensv/qpid-proton,Azure/qpid-proton,FlaPer87/qpid-proton,kgiusti/qpid-proton,prestona/qpid-proton,kgiusti/qpid-proton,bozzzzo/qpid-proton,datawire/qpid-proton,FlaPer87/qpid-proton,astitcher/qpid-proton,gemmellr/qpid-proton,bozzzzo/qpid-proton,prestona/qpid-proton,Karm/qpid-proton,RobertoMalatesta/qpid-proton,datawire/qpid-proton,datawire/qpid-proton,Karm/qpid-proton,wprice/qpid-proton,prestona/qpid-proton,RobertoMalatesta/qpid-proton,RobertoMalatesta/qpid-proton,apache/qpid-proton,Azure/qpid-proton,ssorj/qpid-proton,bozzzzo/qpid-proton,clemensv/qpid-proton,wprice/qpid-proton,ssorj/qpid-proton,prestona/qpid-proton,prestona/qpid-proton,prestona/qpid-proton,ChugR/qpid-proton,clemensv/qpid-proton,datawire/qpid-proton,prestona/qpid-proton,gemmellr/qpid-proton,alanconway/qpid-proton,Azure/qpid-proton,Azure/qpid-proton,FlaPer87/qpid-proton,prestona/qpid-proton,Karm/qpid-proton,prestona/qpid-proton,prestona/qpid-proton,RobertoMalatesta/qpid-proton,FlaPer87/qpid-proton,RobertoMalatesta/qpid-proton,Karm/qpid-proton,apache/qpid-proton,astitcher/qpid-proton,alanconway/qpid-proton,FlaPer87/qpid-proton,clemensv/qpid-proton,Azure/qpid-proton,datawire/qpid-proton,Azure/qpid-proton,FlaPer87/qpid-proton,FlaPer87/qpid-proton,Karm/qpid-proton,wprice/qpid-proton,FlaPer87/qpid-proton,datawire/qpid-proton,wprice/qpid-proton,alanconway/qpid-proton,Karm/qpid-proton,wprice/qpid-proton,wprice/qpid-proton,RobertoMalatesta/qpid-proton,FlaPer87/qpid-proton,datawire/qpid-proton,RobertoMalatesta/qpid-proton,datawire/qpid-proton,apache/qpid-proton,ssorj/qpid-proton,bozzzzo/qpid-proton,astitcher/qpid-proton,ChugR/qpid-proton,bozzzzo/qpid-proton,ChugR/qpid-proton,bozzzzo/qpid-proton,clemensv/qpid-proton,Karm/qpid-proton,ssorj/qpid-proton,Azure/qpid-proton,Azure/qpid-proton,apache/qpid-proton,RobertoMalatesta/qpid-proton,datawire/qpid-proton,clemensv/qpid-proton,prestona/qpid-proton,bozzzzo/qpid-proton,apache/qpid-proton,ChugR/qpid-proton,bozzzzo/qpid-proton,alanconway/qpid-proton,ssorj/qpid-proton,gemmellr/qpid-proton-j,bozzzzo/qpid-proton,wprice/qpid-proton,gemmellr/qpid-proton,gemmellr/qpid-proton,datawire/qpid-proton,alanconway/qpid-proton,FlaPer87/qpid-proton,wprice/qpid-proton,kgiusti/qpid-proton