Buck: Fix lib/codemirror:jar rule by making it repeatable
Buck: Fix lib/codemirror:jar rule by making it repeatable

Replace "mv" with "cp" in //lib/codemirror:jar target. Usage of "mv" is
wrong here, while it makes the rule not repeatable: when the rule is
changed and thus must be reevaluated, it cannot: css and js were moved
and cannot be accessed any more.

Note: That is expected that after applying this change the build of jar
is failing:

  $ buck build lib/codemirror:jar
  cp: cannot stat <path to /buck-out/gen/lib/codemirror/cm3.css>:
  No such file or directory

That's the bug this change is fixing.  To recover wipe out the Buck output
directory:

  rm -rf buck-out

Change-Id: I1bfc5bb10eaa52332043914641a72510c8e539c5

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