Replace an empty buck target with //...
Replace an empty buck target with //...

Summary: An empty target wasn't matching all targets for a sliceless project because it was looking for a project_config option, so, when using the new project generator and not specifying a slice, we should treat it as if the user has specified //... (i.e. everything).

Test Plan:
Local testing
Sandcastle.

Reviewed By: cotizo

fbshipit-source-id: 751b1b3

illicitonion/buck,clonetwin26/buck,rmaz/buck,grumpyjames/buck,darkforestzero/buck,sdwilsh/buck,shybovycha/buck,shs96c/buck,janicduplessis/buck,grumpyjames/buck,ilya-klyuchnikov/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,grumpyjames/buck,JoelMarcey/buck,justinmuller/buck,robbertvanginkel/buck,zhan-xiong/buck,rmaz/buck,dsyang/buck,brettwooldridge/buck,dsyang/buck,SeleniumHQ/buck,marcinkwiatkowski/buck,Addepar/buck,OkBuilds/buck,OkBuilds/buck,illicitonion/buck,OkBuilds/buck,brettwooldridge/buck,robbertvanginkel/buck,davido/buck,k21/buck,janicduplessis/buck,illicitonion/buck,kageiit/buck,clonetwin26/buck,JoelMarcey/buck,illicitonion/buck,clonetwin26/buck,raviagarwal7/buck,vschs007/buck,dsyang/buck,rmaz/buck,kageiit/buck,illicitonion/buck,romanoid/buck,marcinkwiatkowski/buck,grumpyjames/buck,brettwooldridge/buck,romanoid/buck,zhan-xiong/buck,robbertvanginkel/buck,clonetwin26/buck,shs96c/buck,ilya-klyuchnikov/buck,darkforestzero/buck,raviagarwal7/buck,k21/buck,marcinkwiatkowski/buck,janicduplessis/buck,dsyang/buck,brettwooldridge/buck,LegNeato/buck,kageiit/buck,brettwooldridge/buck,darkforestzero/buck,clonetwin26/buck,zpao/buck,janicduplessis/buck,OkBuilds/buck,brettwooldridge/buck,SeleniumHQ/buck,daedric/buck,ilya-klyuchnikov/buck,dsyang/buck,justinmuller/buck,ilya-klyuchnikov/buck,zpao/buck,raviagarwal7/buck,kageiit/buck,nguyentruongtho/buck,ilya-klyuchnikov/buck,vschs007/buck,kageiit/buck,justinmuller/buck,clonetwin26/buck,romanoid/buck,Addepar/buck,janicduplessis/buck,daedric/buck,shs96c/buck,romanoid/buck,k21/buck,brettwooldridge/buck,shybovycha/buck,daedric/buck,facebook/buck,zpao/buck,zpao/buck,JoelMarcey/buck,darkforestzero/buck,k21/buck,raviagarwal7/buck,LegNeato/buck,ilya-klyuchnikov/buck,justinmuller/buck,darkforestzero/buck,daedric/buck,shs96c/buck,brettwooldridge/buck,facebook/buck,vschs007/buck,shs96c/buck,dsyang/buck,daedric/buck,justinmuller/buck,grumpyjames/buck,shybovycha/buck,facebook/buck,justinmuller/buck,SeleniumHQ/buck,rmaz/buck,vschs007/buck,vschs007/buck,zhan-xiong/buck,romanoid/buck,JoelMarcey/buck,zhan-xiong/buck,Addepar/buck,nguyentruongtho/buck,daedric/buck,daedric/buck,ilya-klyuchnikov/buck,vschs007/buck,LegNeato/buck,justinmuller/buck,janicduplessis/buck,nguyentruongtho/buck,SeleniumHQ/buck,davido/buck,k21/buck,LegNeato/buck,rmaz/buck,grumpyjames/buck,davido/buck,darkforestzero/buck,robbertvanginkel/buck,LegNeato/buck,illicitonion/buck,robbertvanginkel/buck,rmaz/buck,justinmuller/buck,shs96c/buck,raviagarwal7/buck,robbertvanginkel/buck,robbertvanginkel/buck,facebook/buck,shs96c/buck,sdwilsh/buck,shybovycha/buck,shybovycha/buck,marcinkwiatkowski/buck,justinmuller/buck,Addepar/buck,SeleniumHQ/buck,vschs007/buck,davido/buck,daedric/buck,clonetwin26/buck,LegNeato/buck,zhan-xiong/buck,k21/buck,SeleniumHQ/buck,janicduplessis/buck,rmaz/buck,darkforestzero/buck,shs96c/buck,justinmuller/buck,OkBuilds/buck,grumpyjames/buck,vschs007/buck,grumpyjames/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,davido/buck,raviagarwal7/buck,k21/buck,sdwilsh/buck,clonetwin26/buck,facebook/buck,k21/buck,romanoid/buck,Addepar/buck,zhan-xiong/buck,janicduplessis/buck,kageiit/buck,davido/buck,shybovycha/buck,OkBuilds/buck,janicduplessis/buck,grumpyjames/buck,Addepar/buck,OkBuilds/buck,nguyentruongtho/buck,illicitonion/buck,daedric/buck,JoelMarcey/buck,romanoid/buck,brettwooldridge/buck,nguyentruongtho/buck,vschs007/buck,davido/buck,SeleniumHQ/buck,justinmuller/buck,brettwooldridge/buck,shybovycha/buck,marcinkwiatkowski/buck,brettwooldridge/buck,romanoid/buck,raviagarwal7/buck,illicitonion/buck,SeleniumHQ/buck,SeleniumHQ/buck,SeleniumHQ/buck,zhan-xiong/buck,sdwilsh/buck,romanoid/buck,darkforestzero/buck,justinmuller/buck,zhan-xiong/buck,dsyang/buck,illicitonion/buck,grumpyjames/buck,marcinkwiatkowski/buck,zhan-xiong/buck,darkforestzero/buck,JoelMarcey/buck,davido/buck,romanoid/buck,darkforestzero/buck,justinmuller/buck,grumpyjames/buck,Addepar/buck,rmaz/buck,Addepar/buck,darkforestzero/buck,JoelMarcey/buck,illicitonion/buck,zpao/buck,k21/buck,janicduplessis/buck,zpao/buck,facebook/buck,daedric/buck,darkforestzero/buck,OkBuilds/buck,brettwooldridge/buck,LegNeato/buck,zpao/buck,raviagarwal7/buck,dsyang/buck,k21/buck,marcinkwiatkowski/buck,clonetwin26/buck,SeleniumHQ/buck,clonetwin26/buck,kageiit/buck,nguyentruongtho/buck,Addepar/buck,Addepar/buck,clonetwin26/buck,romanoid/buck,ilya-klyuchnikov/buck,LegNeato/buck,Addepar/buck,OkBuilds/buck,k21/buck,rmaz/buck,JoelMarcey/buck,LegNeato/buck,robbertvanginkel/buck,dsyang/buck,k21/buck,shybovycha/buck,dsyang/buck,clonetwin26/buck,robbertvanginkel/buck,romanoid/buck,zhan-xiong/buck,vschs007/buck,sdwilsh/buck,JoelMarcey/buck,OkBuilds/buck,janicduplessis/buck,sdwilsh/buck,sdwilsh/buck,robbertvanginkel/buck,brettwooldridge/buck,clonetwin26/buck,robbertvanginkel/buck,raviagarwal7/buck,raviagarwal7/buck,LegNeato/buck,OkBuilds/buck,grumpyjames/buck,robbertvanginkel/buck,illicitonion/buck,daedric/buck,rmaz/buck,SeleniumHQ/buck,raviagarwal7/buck,marcinkwiatkowski/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,davido/buck,shs96c/buck,sdwilsh/buck,facebook/buck,shybovycha/buck,Addepar/buck,zhan-xiong/buck,davido/buck,shs96c/buck,shs96c/buck,romanoid/buck,sdwilsh/buck,davido/buck,JoelMarcey/buck,LegNeato/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,janicduplessis/buck,shybovycha/buck,darkforestzero/buck,sdwilsh/buck,sdwilsh/buck,illicitonion/buck,OkBuilds/buck,marcinkwiatkowski/buck,OkBuilds/buck,ilya-klyuchnikov/buck,rmaz/buck,LegNeato/buck,illicitonion/buck,vschs007/buck,dsyang/buck,dsyang/buck,shybovycha/buck,marcinkwiatkowski/buck,shybovycha/buck,marcinkwiatkowski/buck,rmaz/buck,Addepar/buck,vschs007/buck,shybovycha/buck,vschs007/buck,rmaz/buck,marcinkwiatkowski/buck,raviagarwal7/buck,raviagarwal7/buck,shs96c/buck,davido/buck,nguyentruongtho/buck,k21/buck,zhan-xiong/buck,LegNeato/buck,daedric/buck,SeleniumHQ/buck,davido/buck,zhan-xiong/buck,shs96c/buck,sdwilsh/buck,sdwilsh/buck,daedric/buck,marcinkwiatkowski/buck,dsyang/buck