Catch CalledProcessError when downloading dependencies with buck
Catch CalledProcessError when downloading dependencies with buck

When calling curl with check_call, CalledProcessError can be
raised.  Catch it to avoid an ugly python traceback in the build
log.

Change-Id: Icd56b94391fc6fb51e4d84889b123e892d15bc5b

TonyChai24/test,supriyantomaftuh/gerrit,gracefullife/gerrit,zommarin/gerrit,Distrotech/gerrit,qtproject/qtqa-gerrit,Seinlin/gerrit,anminhsu/gerrit,WANdisco/gerrit,gracefullife/gerrit,GerritCodeReview/gerrit,renchaorevee/gerrit,anminhsu/gerrit,renchaorevee/gerrit,netroby/gerrit,TonyChai24/test,dwhipstock/gerrit,quyixia/gerrit,WANdisco/gerrit,dwhipstock/gerrit,Seinlin/gerrit,Distrotech/gerrit,supriyantomaftuh/gerrit,gcoders/gerrit,qtproject/qtqa-gerrit,midnightradio/gerrit,thesamet/gerrit,supriyantomaftuh/gerrit,pkdevbox/gerrit,bootstraponline-archive/gerrit-mirror,supriyantomaftuh/gerrit,joshuawilson/merrit,Team-OctOS/host_gerrit,netroby/gerrit,thinkernel/gerrit,Overruler/gerrit,gcoders/gerrit,gcoders/gerrit,qtproject/qtqa-gerrit,pkdevbox/gerrit,GerritCodeReview/gerrit,Seinlin/gerrit,renchaorevee/gerrit,qtproject/qtqa-gerrit,Seinlin/gerrit,TonyChai24/test,thinkernel/gerrit,anminhsu/gerrit,Overruler/gerrit,Saulis/gerrit,joshuawilson/merrit,gcoders/gerrit,bootstraponline-archive/gerrit-mirror,joshuawilson/merrit,MerritCR/merrit,pkdevbox/gerrit,Team-OctOS/host_gerrit,Seinlin/gerrit,thinkernel/gerrit,gerrit-review/gerrit,pkdevbox/gerrit,WANdisco/gerrit,MerritCR/merrit,Saulis/gerrit,Saulis/gerrit,thesamet/gerrit,Overruler/gerrit,supriyantomaftuh/gerrit,MerritCR/merrit,thesamet/gerrit,gcoders/gerrit,netroby/gerrit,anminhsu/gerrit,jackminicloud/test,quyixia/gerrit,bpollack/gerrit,quyixia/gerrit,pkdevbox/gerrit,MerritCR/merrit,zommarin/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,quyixia/gerrit,Saulis/gerrit,Overruler/gerrit,gcoders/gerrit,renchaorevee/gerrit,Team-OctOS/host_gerrit,TonyChai24/test,anminhsu/gerrit,jackminicloud/test,gracefullife/gerrit,dwhipstock/gerrit,qtproject/qtqa-gerrit,bpollack/gerrit,thesamet/gerrit,hdost/gerrit,jackminicloud/test,GerritCodeReview/gerrit,dwhipstock/gerrit,WANdisco/gerrit,quyixia/gerrit,qtproject/qtqa-gerrit,midnightradio/gerrit,supriyantomaftuh/gerrit,gcoders/gerrit,gracefullife/gerrit,MerritCR/merrit,anminhsu/gerrit,qtproject/qtqa-gerrit,TonyChai24/test,joshuawilson/merrit,GerritCodeReview/gerrit,WANdisco/gerrit,gerrit-review/gerrit,Seinlin/gerrit,jackminicloud/test,GerritCodeReview/gerrit,Team-OctOS/host_gerrit,Saulis/gerrit,Team-OctOS/host_gerrit,MerritCR/merrit,supriyantomaftuh/gerrit,thesamet/gerrit,hdost/gerrit,hdost/gerrit,Distrotech/gerrit,bootstraponline-archive/gerrit-mirror,thinkernel/gerrit,renchaorevee/gerrit,thinkernel/gerrit,Team-OctOS/host_gerrit,bpollack/gerrit,MerritCR/merrit,TonyChai24/test,hdost/gerrit,midnightradio/gerrit,bootstraponline-archive/gerrit-mirror,bpollack/gerrit,bootstraponline-archive/gerrit-mirror,Distrotech/gerrit,WANdisco/gerrit,hdost/gerrit,renchaorevee/gerrit,hdost/gerrit,bootstraponline-archive/gerrit-mirror,MerritCR/merrit,quyixia/gerrit,dwhipstock/gerrit,joshuawilson/merrit,netroby/gerrit,gerrit-review/gerrit,joshuawilson/merrit,renchaorevee/gerrit,quyixia/gerrit,gerrit-review/gerrit,Seinlin/gerrit,jackminicloud/test,gracefullife/gerrit,thesamet/gerrit,thesamet/gerrit,midnightradio/gerrit,joshuawilson/merrit,Saulis/gerrit,bpollack/gerrit,Team-OctOS/host_gerrit,bpollack/gerrit,jackminicloud/test,Overruler/gerrit,thinkernel/gerrit,jackminicloud/test,joshuawilson/merrit,TonyChai24/test,pkdevbox/gerrit,Distrotech/gerrit,WANdisco/gerrit,Distrotech/gerrit,zommarin/gerrit,midnightradio/gerrit,gerrit-review/gerrit,hdost/gerrit,dwhipstock/gerrit,thinkernel/gerrit,gerrit-review/gerrit,anminhsu/gerrit,GerritCodeReview/gerrit,zommarin/gerrit,netroby/gerrit,midnightradio/gerrit,pkdevbox/gerrit,Distrotech/gerrit,dwhipstock/gerrit,zommarin/gerrit,netroby/gerrit,netroby/gerrit,GerritCodeReview/gerrit,Overruler/gerrit