build: Undefine variables in generated deps.mk files
build: Undefine variables in generated deps.mk files

That will make generated files a tiny bit shorter.

nhlfr/rkt,yifan-gu/rkt,endocode/rkt,intfrr/rkt,kinvolk/rkt,mjg59/rkt,intfrr/rkt,coreos/rkt,tv42/rkt,iaguis/rkt,Wilybald/rkt,blixtra/rkt,krnowak/rkt,monstermunchkin/rkt,jasonchaffee/rkt,monstermunchkin/rkt,dalanlan/rkt,sinfomicien/rkt,sstabellini/rkt,kinvolk/rkt,dalanlan/rkt,smarvin/rkt,mike1729/rkt,lucasallan/rkt,alexhersh/rkt,Shashwatsh/rkt,endocode/rkt,squeed/rkt,rkt/rkt,liubq919/rkt,linki/rkt,marineam/rkt,dgonyeo/rkt,dalanlan/rkt,matthaias/rkt,intelsdi-x/rkt,joshix/rkt,euank/rkt,mike1729/rkt,markllama/rkt,kbrwn/rkt,sinfomicien/rkt,lucasallan/rkt,ybubnov/rkt,ybubnov/rkt,kinvolk/rkt,coreos/rkt,coreos/rkt,alexhersh/rkt,jakon89/rkt,cab105/rkt,sstabellini/rkt,ybubnov/rkt,jzelinskie/rkt,sstabellini/rkt,iankronquist/rkt,jonboulle/rkt,akshaykarle/rkt,dgonyeo/rkt,smarvin/rkt,cab105/rkt,adfernandes/rkt,luebken/rkt,matthaias/rkt,joshix/rkt,markllama/rkt,blixtra/rkt,chrisseto/rkt,Wilybald/rkt,rkt/rkt,jzelinskie/rkt,marineam/rkt,jjlakis/rkt,liubq919/rkt,kbrwn/rkt,smarvin/rkt,yifan-gu/rocket,Shashwatsh/rkt,jonboulle/rkt,intelsdi-x/rkt,Yhgenomics/rkt,akshaykarle/rkt,Wilybald/rkt,jakon89/rkt,markllama/rkt,iaguis/rkt,liugenping/rkt,shobhit85/rkt,iankronquist/rkt,alexhersh/rkt,marineam/rkt,yifan-gu/rkt,jasonchaffee/rkt,euank/rkt,dgonyeo/rkt,adfernandes/rkt,alban/rkt,kbrwn/rkt,jjlakis/rkt,s-urbaniak/rkt,yifan-gu/rocket,monstermunchkin/rkt,liugenping/rkt,linki/rkt,shobhit85/rkt,euank/rkt,linki/rkt,sgotti/rkt,intfrr/rkt,nhlfr/rkt,endocode/rkt,lucasallan/rkt,jzelinskie/rkt,mjg59/rkt,liugenping/rkt,achanda/rkt,Yhgenomics/rkt,sgotti/rkt,mike1729/rkt,lee212/rkt,chrisseto/rkt,iaguis/rkt,yifan-gu/rkt,jakon89/rkt,tmrts/rkt,adfernandes/rkt,Shashwatsh/rkt,shobhit85/rkt,Wilybald/rkt,alban/rkt,akshaykarle/rkt,tmrts/rkt,s-urbaniak/rkt,Yhgenomics/rkt,luebken/rkt,lee212/rkt,il9ue/rkt,nhlfr/rkt,sgotti/rkt,matthaias/rkt,krnowak/rkt,squeed/rkt,cab105/rkt,mjg59/rkt,yifan-gu/rocket,kinvolk/rkt,jjlakis/rkt,s-urbaniak/rkt,sinfomicien/rkt,chrisseto/rkt,il9ue/rkt,joshix/rkt,tmrts/rkt,rkt/rkt,achanda/rkt,jasonchaffee/rkt,blixtra/rkt,lucasallan/rkt,achanda/rkt,liubq919/rkt,joshix/rkt,jonboulle/rkt,lee212/rkt,il9ue/rkt,intelsdi-x/rkt,rkt/rkt,alban/rkt,iankronquist/rkt,tv42/rkt,tv42/rkt,squeed/rkt,luebken/rkt,krnowak/rkt