Work around CxxLibrary not having output
Work around CxxLibrary not having output

Summary:
  * Currently when we try to build an Apple extension with Buck, we fail because
    we try to copy the output of a `CxxLibrary` into the bundle, but
    `CxxLibrary` is a `NoopBuildRule` and has no output. In the long term we
    should fix what we set as the `binary` parameter, but for now let's work
    around the issue by not building the extension libraries.

Test Plan:
  * Try building an extension, check that the build does not fail (although
    the extension is not built).

brettwooldridge/buck,janicduplessis/buck,pwz3n0/buck,brettwooldridge/buck,mikekap/buck,Heart2009/buck,k21/buck,rowillia/buck,illicitonion/buck,sdwilsh/buck,daedric/buck,facebook/buck,mikekap/buck,rhencke/buck,SeleniumHQ/buck,shs96c/buck,shybovycha/buck,luiseduardohdbackup/buck,hgl888/buck,vschs007/buck,vine/buck,rowillia/buck,LegNeato/buck,daedric/buck,grumpyjames/buck,daedric/buck,vine/buck,stuhood/buck,SeleniumHQ/buck,Addepar/buck,neonichu/buck,zhan-xiong/buck,mogers/buck,rmaz/buck,justinmuller/buck,JoelMarcey/buck,sdwilsh/buck,siddhartharay007/buck,robbertvanginkel/buck,shs96c/buck,ilya-klyuchnikov/buck,k21/buck,liuyang-li/buck,liuyang-li/buck,ilya-klyuchnikov/buck,brettwooldridge/buck,OkBuilds/buck,zhan-xiong/buck,shybovycha/buck,mogers/buck,brettwooldridge/buck,clonetwin26/buck,clonetwin26/buck,zhuxiaohao/buck,LegNeato/buck,marcinkwiatkowski/buck,Learn-Android-app/buck,mogers/buck,vschs007/buck,janicduplessis/buck,siddhartharay007/buck,neonichu/buck,daedric/buck,lukw00/buck,vine/buck,ilya-klyuchnikov/buck,rhencke/buck,rowillia/buck,janicduplessis/buck,dsyang/buck,JoelMarcey/buck,liuyang-li/buck,Heart2009/buck,zhan-xiong/buck,mogers/buck,liuyang-li/buck,LegNeato/buck,LegNeato/buck,vschs007/buck,OkBuilds/buck,zpao/buck,zhuxiaohao/buck,sdwilsh/buck,vschs007/buck,zhan-xiong/buck,Distrotech/buck,illicitonion/buck,ilya-klyuchnikov/buck,rhencke/buck,dsyang/buck,marcinkwiatkowski/buck,Learn-Android-app/buck,marcinkwiatkowski/buck,bocon13/buck,Dominator008/buck,vschs007/buck,lukw00/buck,kageiit/buck,Learn-Android-app/buck,bocon13/buck,romanoid/buck,LegNeato/buck,mogers/buck,zhuxiaohao/buck,brettwooldridge/buck,tgummerer/buck,zpao/buck,OkBuilds/buck,1yvT0s/buck,clonetwin26/buck,facebook/buck,pwz3n0/buck,brettwooldridge/buck,mikekap/buck,justinmuller/buck,justinmuller/buck,artiya4u/buck,bocon13/buck,davido/buck,artiya4u/buck,tgummerer/buck,tgummerer/buck,LegNeato/buck,justinmuller/buck,raviagarwal7/buck,SeleniumHQ/buck,Learn-Android-app/buck,davido/buck,shs96c/buck,dsyang/buck,bocon13/buck,Addepar/buck,k21/buck,grumpyjames/buck,brettwooldridge/buck,Heart2009/buck,marcinkwiatkowski/buck,artiya4u/buck,SeleniumHQ/buck,sdwilsh/buck,hgl888/buck,davido/buck,siddhartharay007/buck,darkforestzero/buck,Addepar/buck,luiseduardohdbackup/buck,facebook/buck,mikekap/buck,zhan-xiong/buck,luiseduardohdbackup/buck,rhencke/buck,grumpyjames/buck,dsyang/buck,neonichu/buck,raviagarwal7/buck,OkBuilds/buck,ilya-klyuchnikov/buck,zpao/buck,dsyang/buck,liuyang-li/buck,k21/buck,Heart2009/buck,neonichu/buck,janicduplessis/buck,shybovycha/buck,Addepar/buck,Addepar/buck,k21/buck,shs96c/buck,rhencke/buck,rhencke/buck,daedric/buck,romanoid/buck,sdwilsh/buck,shs96c/buck,neonichu/buck,rmaz/buck,tgummerer/buck,dpursehouse/buck,LegNeato/buck,Distrotech/buck,darkforestzero/buck,vschs007/buck,shybovycha/buck,SeleniumHQ/buck,pwz3n0/buck,janicduplessis/buck,darkforestzero/buck,zpao/buck,ilya-klyuchnikov/buck,tgummerer/buck,rowillia/buck,kageiit/buck,justinmuller/buck,vine/buck,k21/buck,shybovycha/buck,Addepar/buck,liuyang-li/buck,clonetwin26/buck,tgummerer/buck,davido/buck,tgummerer/buck,janicduplessis/buck,grumpyjames/buck,mogers/buck,stuhood/buck,davido/buck,shybovycha/buck,dsyang/buck,ilya-klyuchnikov/buck,shs96c/buck,davido/buck,siddhartharay007/buck,LegNeato/buck,vine/buck,LegNeato/buck,zpao/buck,shs96c/buck,justinmuller/buck,raviagarwal7/buck,nguyentruongtho/buck,robbertvanginkel/buck,zhuxiaohao/buck,luiseduardohdbackup/buck,shs96c/buck,shybovycha/buck,rmaz/buck,pwz3n0/buck,illicitonion/buck,stuhood/buck,daedric/buck,JoelMarcey/buck,JoelMarcey/buck,artiya4u/buck,nguyentruongtho/buck,SeleniumHQ/buck,justinmuller/buck,lukw00/buck,Dominator008/buck,tgummerer/buck,liuyang-li/buck,marcinkwiatkowski/buck,Heart2009/buck,robbertvanginkel/buck,OkBuilds/buck,raviagarwal7/buck,Learn-Android-app/buck,vschs007/buck,artiya4u/buck,rmaz/buck,marcinkwiatkowski/buck,pwz3n0/buck,k21/buck,Distrotech/buck,grumpyjames/buck,k21/buck,Learn-Android-app/buck,rmaz/buck,pwz3n0/buck,darkforestzero/buck,marcinkwiatkowski/buck,vschs007/buck,LegNeato/buck,dushmis/buck,ilya-klyuchnikov/buck,pwz3n0/buck,raviagarwal7/buck,hgl888/buck,pwz3n0/buck,ilya-klyuchnikov/buck,shybovycha/buck,janicduplessis/buck,sdwilsh/buck,Dominator008/buck,SeleniumHQ/buck,shs96c/buck,facebook/buck,SeleniumHQ/buck,robbertvanginkel/buck,dushmis/buck,sdwilsh/buck,neonichu/buck,liuyang-li/buck,pwz3n0/buck,mikekap/buck,illicitonion/buck,Dominator008/buck,shybovycha/buck,Dominator008/buck,daedric/buck,nguyentruongtho/buck,illicitonion/buck,illicitonion/buck,kageiit/buck,illicitonion/buck,mnuessler/buck,davido/buck,vine/buck,vine/buck,1yvT0s/buck,dsyang/buck,hgl888/buck,JoelMarcey/buck,Distrotech/buck,grumpyjames/buck,zhuxiaohao/buck,OkBuilds/buck,LegNeato/buck,dpursehouse/buck,robbertvanginkel/buck,justinmuller/buck,dpursehouse/buck,dpursehouse/buck,mnuessler/buck,rhencke/buck,stuhood/buck,OkBuilds/buck,shybovycha/buck,illicitonion/buck,zhan-xiong/buck,robbertvanginkel/buck,clonetwin26/buck,clonetwin26/buck,artiya4u/buck,darkforestzero/buck,kageiit/buck,lukw00/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,lukw00/buck,kageiit/buck,zhuxiaohao/buck,OkBuilds/buck,zhan-xiong/buck,rmaz/buck,mnuessler/buck,daedric/buck,justinmuller/buck,lukw00/buck,nguyentruongtho/buck,1yvT0s/buck,Dominator008/buck,facebook/buck,daedric/buck,daedric/buck,k21/buck,mikekap/buck,SeleniumHQ/buck,shs96c/buck,Dominator008/buck,raviagarwal7/buck,vschs007/buck,Distrotech/buck,OkBuilds/buck,zpao/buck,liuyang-li/buck,Heart2009/buck,luiseduardohdbackup/buck,raviagarwal7/buck,darkforestzero/buck,kageiit/buck,zhan-xiong/buck,shs96c/buck,1yvT0s/buck,dushmis/buck,Distrotech/buck,Addepar/buck,darkforestzero/buck,romanoid/buck,davido/buck,artiya4u/buck,lukw00/buck,facebook/buck,sdwilsh/buck,rhencke/buck,dpursehouse/buck,clonetwin26/buck,raviagarwal7/buck,stuhood/buck,zpao/buck,pwz3n0/buck,siddhartharay007/buck,artiya4u/buck,SeleniumHQ/buck,k21/buck,janicduplessis/buck,tgummerer/buck,vine/buck,k21/buck,vine/buck,rmaz/buck,stuhood/buck,brettwooldridge/buck,zhan-xiong/buck,shybovycha/buck,Addepar/buck,bocon13/buck,justinmuller/buck,davido/buck,mikekap/buck,darkforestzero/buck,zhuxiaohao/buck,1yvT0s/buck,OkBuilds/buck,rmaz/buck,darkforestzero/buck,stuhood/buck,robbertvanginkel/buck,rowillia/buck,romanoid/buck,ilya-klyuchnikov/buck,dpursehouse/buck,sdwilsh/buck,dushmis/buck,Learn-Android-app/buck,JoelMarcey/buck,Distrotech/buck,SeleniumHQ/buck,mogers/buck,raviagarwal7/buck,grumpyjames/buck,romanoid/buck,raviagarwal7/buck,rowillia/buck,vschs007/buck,romanoid/buck,rmaz/buck,janicduplessis/buck,tgummerer/buck,shs96c/buck,siddhartharay007/buck,Distrotech/buck,nguyentruongtho/buck,clonetwin26/buck,tgummerer/buck,kageiit/buck,LegNeato/buck,mogers/buck,sdwilsh/buck,dpursehouse/buck,dsyang/buck,k21/buck,nguyentruongtho/buck,dushmis/buck,clonetwin26/buck,mnuessler/buck,mnuessler/buck,hgl888/buck,facebook/buck,JoelMarcey/buck,Learn-Android-app/buck,romanoid/buck,illicitonion/buck,rowillia/buck,grumpyjames/buck,marcinkwiatkowski/buck,lukw00/buck,clonetwin26/buck,hgl888/buck,marcinkwiatkowski/buck,clonetwin26/buck,ilya-klyuchnikov/buck,mnuessler/buck,rowillia/buck,zhuxiaohao/buck,zhan-xiong/buck,zhan-xiong/buck,raviagarwal7/buck,darkforestzero/buck,shs96c/buck,brettwooldridge/buck,SeleniumHQ/buck,brettwooldridge/buck,raviagarwal7/buck,vschs007/buck,mikekap/buck,artiya4u/buck,illicitonion/buck,darkforestzero/buck,SeleniumHQ/buck,clonetwin26/buck,marcinkwiatkowski/buck,dushmis/buck,k21/buck,1yvT0s/buck,OkBuilds/buck,bocon13/buck,mogers/buck,brettwooldridge/buck,Dominator008/buck,shybovycha/buck,mnuessler/buck,artiya4u/buck,Learn-Android-app/buck,marcinkwiatkowski/buck,sdwilsh/buck,robbertvanginkel/buck,dushmis/buck,Dominator008/buck,zhuxiaohao/buck,bocon13/buck,ilya-klyuchnikov/buck,Heart2009/buck,darkforestzero/buck,artiya4u/buck,siddhartharay007/buck,vine/buck,clonetwin26/buck,nguyentruongtho/buck,1yvT0s/buck,davido/buck,davido/buck,bocon13/buck,stuhood/buck,hgl888/buck,neonichu/buck,dpursehouse/buck,romanoid/buck,rowillia/buck,luiseduardohdbackup/buck,rowillia/buck,stuhood/buck,rowillia/buck,sdwilsh/buck,grumpyjames/buck,sdwilsh/buck,romanoid/buck,Heart2009/buck,lukw00/buck,Addepar/buck,rhencke/buck,mnuessler/buck,mogers/buck,bocon13/buck,Distrotech/buck,mikekap/buck,Heart2009/buck,janicduplessis/buck,mnuessler/buck,lukw00/buck,brettwooldridge/buck,grumpyjames/buck,Learn-Android-app/buck,mogers/buck,vschs007/buck,Distrotech/buck,neonichu/buck,bocon13/buck,justinmuller/buck,robbertvanginkel/buck,rmaz/buck,raviagarwal7/buck,robbertvanginkel/buck,romanoid/buck,hgl888/buck,lukw00/buck,liuyang-li/buck,stuhood/buck,bocon13/buck,neonichu/buck,luiseduardohdbackup/buck,mikekap/buck,dsyang/buck,JoelMarcey/buck,rhencke/buck,darkforestzero/buck,vine/buck,JoelMarcey/buck,romanoid/buck,luiseduardohdbackup/buck,illicitonion/buck,romanoid/buck,mikekap/buck,Addepar/buck,rmaz/buck,Distrotech/buck,davido/buck,illicitonion/buck,luiseduardohdbackup/buck,robbertvanginkel/buck,brettwooldridge/buck,rmaz/buck,siddhartharay007/buck,JoelMarcey/buck,marcinkwiatkowski/buck,dsyang/buck,dsyang/buck,pwz3n0/buck,vschs007/buck,1yvT0s/buck,bocon13/buck,Dominator008/buck,dsyang/buck,grumpyjames/buck,janicduplessis/buck,Dominator008/buck,liuyang-li/buck,justinmuller/buck,JoelMarcey/buck,Learn-Android-app/buck,JoelMarcey/buck,romanoid/buck,stuhood/buck,daedric/buck,janicduplessis/buck,OkBuilds/buck,zhan-xiong/buck,dsyang/buck,dushmis/buck,shybovycha/buck,JoelMarcey/buck,daedric/buck,davido/buck,marcinkwiatkowski/buck,Addepar/buck,dushmis/buck,OkBuilds/buck,dushmis/buck,siddhartharay007/buck,illicitonion/buck,Addepar/buck,zhan-xiong/buck,justinmuller/buck,rowillia/buck,hgl888/buck,grumpyjames/buck,daedric/buck,rhencke/buck,robbertvanginkel/buck,LegNeato/buck,mikekap/buck,rmaz/buck,Dominator008/buck,1yvT0s/buck,Addepar/buck