make: improve Makefile.dep
make: improve Makefile.dep

- calls itself recursively until all dependencies are resolved
- automatically include boards/$board/Makefile.dep
- automatically include pkg/$pkg/Makefile.dep

rfuentess/RIOT,Hyungsin/RIOT-OS,miri64/RIOT,LudwigOrtmann/RIOT,ks156/RIOT,syin2/RIOT,roberthartung/RIOT,rfuentess/RIOT,TobiasFredersdorf/RIOT,toonst/RIOT,kaleb-himes/RIOT,thomaseichinger/RIOT,OlegHahm/RIOT,dailab/RIOT,thomaseichinger/RIOT,jbeyerstedt/RIOT-OTA-update,kYc0o/RIOT,Ell-i/RIOT,plushvoxel/RIOT,immesys/RiSyn,aeneby/RIOT,kbumsik/RIOT,plushvoxel/RIOT,yogo1212/RIOT,aeneby/RIOT,immesys/RiSyn,backenklee/RIOT,basilfx/RIOT,tfar/RIOT,syin2/RIOT,BytesGalore/RIOT,kYc0o/RIOT,ant9000/RIOT,A-Paul/RIOT,Ell-i/RIOT,kaleb-himes/RIOT,dailab/RIOT,biboc/RIOT,kerneltask/RIOT,ks156/RIOT,neiljay/RIOT,kbumsik/RIOT,alignan/RIOT,beurdouche/RIOT,gautric/RIOT,biboc/RIOT,smlng/RIOT,Josar/RIOT,aeneby/RIOT,mtausig/RIOT,mfrey/RIOT,immesys/RiSyn,adrianghc/RIOT,cladmi/RIOT,LudwigKnuepfer/RIOT,ks156/RIOT,cladmi/RIOT,TobiasFredersdorf/RIOT,TobiasFredersdorf/RIOT,OTAkeys/RIOT,kb2ma/RIOT,basilfx/RIOT,TobiasFredersdorf/RIOT,kb2ma/RIOT,yogo1212/RIOT,Josar/RIOT,Hyungsin/RIOT-OS,authmillenon/RIOT,katezilla/RIOT,gebart/RIOT,kerneltask/RIOT,adrianghc/RIOT,avmelnikoff/RIOT,josephnoir/RIOT,yogo1212/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kaspar030/RIOT,x3ro/RIOT,biboc/RIOT,jfischer-phytec-iot/RIOT,mtausig/RIOT,kaspar030/RIOT,kbumsik/RIOT,LudwigKnuepfer/RIOT,miri64/RIOT,roberthartung/RIOT,immesys/RiSyn,aeneby/RIOT,gebart/RIOT,jasonatran/RIOT,OTAkeys/RIOT,BytesGalore/RIOT,A-Paul/RIOT,neumodisch/RIOT,kYc0o/RIOT,lazytech-org/RIOT,dkm/RIOT,LudwigKnuepfer/RIOT,kbumsik/RIOT,A-Paul/RIOT,BytesGalore/RIOT,ks156/RIOT,rfuentess/RIOT,alignan/RIOT,Ell-i/RIOT,mtausig/RIOT,hamilton-mote/RIOT-OS,LudwigOrtmann/RIOT,avmelnikoff/RIOT,cladmi/RIOT,yogo1212/RIOT,jasonatran/RIOT,kerneltask/RIOT,gebart/RIOT,neiljay/RIOT,OTAkeys/RIOT,dailab/RIOT,authmillenon/RIOT,hamilton-mote/RIOT-OS,tfar/RIOT,jfischer-phytec-iot/RIOT,x3ro/RIOT,beurdouche/RIOT,kb2ma/RIOT,smlng/RIOT,smlng/RIOT,neumodisch/RIOT,biboc/RIOT,basilfx/RIOT,mfrey/RIOT,dailab/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,backenklee/RIOT,katezilla/RIOT,gebart/RIOT,OTAkeys/RIOT,roberthartung/RIOT,A-Paul/RIOT,kaspar030/RIOT,jasonatran/RIOT,lazytech-org/RIOT,ant9000/RIOT,adrianghc/RIOT,OTAkeys/RIOT,immesys/RiSyn,smlng/RIOT,toonst/RIOT,lazytech-org/RIOT,ant9000/RIOT,avmelnikoff/RIOT,plushvoxel/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,beurdouche/RIOT,jbeyerstedt/RIOT-OTA-update,cladmi/RIOT,jbeyerstedt/RIOT-OTA-update,neiljay/RIOT,kYc0o/RIOT,kbumsik/RIOT,RIOT-OS/RIOT,roberthartung/RIOT,kb2ma/RIOT,OlegHahm/RIOT,backenklee/RIOT,kaleb-himes/RIOT,Hyungsin/RIOT-OS,LudwigOrtmann/RIOT,basilfx/RIOT,neiljay/RIOT,toonst/RIOT,mtausig/RIOT,RIOT-OS/RIOT,beurdouche/RIOT,dkm/RIOT,aeneby/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,jbeyerstedt/RIOT-OTA-update,kerneltask/RIOT,thomaseichinger/RIOT,authmillenon/RIOT,OlegHahm/RIOT,syin2/RIOT,adjih/RIOT,LudwigKnuepfer/RIOT,kaspar030/RIOT,LudwigKnuepfer/RIOT,syin2/RIOT,cladmi/RIOT,neumodisch/RIOT,ant9000/RIOT,syin2/RIOT,A-Paul/RIOT,mfrey/RIOT,yogo1212/RIOT,neumodisch/RIOT,mfrey/RIOT,immesys/RiSyn,dkm/RIOT,Josar/RIOT,lazytech-org/RIOT,BytesGalore/RIOT,RIOT-OS/RIOT,neumodisch/RIOT,roberthartung/RIOT,biboc/RIOT,adjih/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,gautric/RIOT,neiljay/RIOT,beurdouche/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,plushvoxel/RIOT,BytesGalore/RIOT,tfar/RIOT,toonst/RIOT,miri64/RIOT,jbeyerstedt/RIOT-OTA-update,alignan/RIOT,adjih/RIOT,Hyungsin/RIOT-OS,ks156/RIOT,adrianghc/RIOT,mtausig/RIOT,dailab/RIOT,kaleb-himes/RIOT,alignan/RIOT,josephnoir/RIOT,katezilla/RIOT,backenklee/RIOT,plushvoxel/RIOT,kaleb-himes/RIOT,RIOT-OS/RIOT,Josar/RIOT,thomaseichinger/RIOT,dkm/RIOT,tfar/RIOT,gautric/RIOT,adjih/RIOT,Ell-i/RIOT,LudwigOrtmann/RIOT,katezilla/RIOT,katezilla/RIOT,smlng/RIOT,OlegHahm/RIOT,avmelnikoff/RIOT,mfrey/RIOT,hamilton-mote/RIOT-OS,jfischer-phytec-iot/RIOT,neumodisch/RIOT,gautric/RIOT,rfuentess/RIOT,hamilton-mote/RIOT-OS,kaspar030/RIOT,jasonatran/RIOT,tfar/RIOT,adrianghc/RIOT,basilfx/RIOT,jasonatran/RIOT,josephnoir/RIOT,josephnoir/RIOT,Josar/RIOT,avmelnikoff/RIOT,OlegHahm/RIOT,LudwigOrtmann/RIOT,x3ro/RIOT,ant9000/RIOT,gebart/RIOT,dkm/RIOT,yogo1212/RIOT,kb2ma/RIOT,jfischer-phytec-iot/RIOT,x3ro/RIOT,TobiasFredersdorf/RIOT,miri64/RIOT,josephnoir/RIOT,miri64/RIOT,toonst/RIOT,kerneltask/RIOT,authmillenon/RIOT,LudwigOrtmann/RIOT,authmillenon/RIOT,gautric/RIOT,Hyungsin/RIOT-OS,jfischer-phytec-iot/RIOT,lazytech-org/RIOT,Ell-i/RIOT,thomaseichinger/RIOT,hamilton-mote/RIOT-OS,backenklee/RIOT,x3ro/RIOT,authmillenon/RIOT,rfuentess/RIOT,adjih/RIOT,alignan/RIOT