tests/xtimer_drift: Compute drift and jitter
tests/xtimer_drift: Compute drift and jitter

 - drift is the total difference from the expected time
 - jitter is the difference only since the last printout

FrancescoErmini/RIOT,MohmadAyman/RIOT,malosek/RIOT,malosek/RIOT,toonst/RIOT,adjih/RIOT,smlng/RIOT,hamilton-mote/RIOT-OS,kbumsik/RIOT,jfischer-phytec-iot/RIOT,neumodisch/RIOT,aeneby/RIOT,miri64/RIOT,josephnoir/RIOT,RIOT-OS/RIOT,FrancescoErmini/RIOT,OlegHahm/RIOT,lazytech-org/RIOT,yogo1212/RIOT,syin2/RIOT,backenklee/RIOT,dkm/RIOT,toonst/RIOT,plushvoxel/RIOT,alignan/RIOT,jremmert-phytec-iot/RIOT,rousselk/RIOT,ks156/RIOT,Ell-i/RIOT,A-Paul/RIOT,kaspar030/RIOT,ant9000/RIOT,adjih/RIOT,tfar/RIOT,katezilla/RIOT,ant9000/RIOT,basilfx/RIOT,rfuentess/RIOT,dkm/RIOT,adjih/RIOT,jremmert-phytec-iot/RIOT,rakendrathapa/RIOT,MohmadAyman/RIOT,immesys/RiSyn,plushvoxel/RIOT,LudwigKnuepfer/RIOT,cladmi/RIOT,malosek/RIOT,jremmert-phytec-iot/RIOT,tfar/RIOT,dailab/RIOT,jfischer-phytec-iot/RIOT,yogo1212/RIOT,Ell-i/RIOT,kb2ma/RIOT,zhuoshuguo/RIOT,thomaseichinger/RIOT,FrancescoErmini/RIOT,avmelnikoff/RIOT,biboc/RIOT,wentaoshang/RIOT,aeneby/RIOT,Josar/RIOT,yogo1212/RIOT,ks156/RIOT,Hyungsin/RIOT-OS,immesys/RiSyn,cladmi/RIOT,katezilla/RIOT,brettswann/RIOT,gautric/RIOT,plushvoxel/RIOT,asanka-code/RIOT,wentaoshang/RIOT,kYc0o/RIOT,authmillenon/RIOT,beurdouche/RIOT,biboc/RIOT,kbumsik/RIOT,LudwigKnuepfer/RIOT,jasonatran/RIOT,thomaseichinger/RIOT,aeneby/RIOT,zhuoshuguo/RIOT,malosek/RIOT,rousselk/RIOT,jfischer-phytec-iot/RIOT,ks156/RIOT,tfar/RIOT,gautric/RIOT,kaleb-himes/RIOT,yogo1212/RIOT,x3ro/RIOT,kerneltask/RIOT,adrianghc/RIOT,OTAkeys/RIOT,kb2ma/RIOT,syin2/RIOT,immesys/RiSyn,dailab/RIOT,brettswann/RIOT,altairpearl/RIOT,basilfx/RIOT,josephnoir/RIOT,immesys/RiSyn,foss-for-synopsys-dwc-arc-processors/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,neumodisch/RIOT,avmelnikoff/RIOT,OlegHahm/RIOT,FrancescoErmini/RIOT,syin2/RIOT,alignan/RIOT,d00616/RIOT,mfrey/RIOT,mfrey/RIOT,neumodisch/RIOT,gebart/RIOT,d00616/RIOT,gautric/RIOT,rousselk/RIOT,A-Paul/RIOT,toonst/RIOT,zhuoshuguo/RIOT,Josar/RIOT,cladmi/RIOT,zhuoshuguo/RIOT,MohmadAyman/RIOT,kYc0o/RIOT,TobiasFredersdorf/RIOT,BytesGalore/RIOT,dailab/RIOT,adjih/RIOT,josephnoir/RIOT,attdona/RIOT,kerneltask/RIOT,kYc0o/RIOT,jasonatran/RIOT,mfrey/RIOT,mtausig/RIOT,biboc/RIOT,LudwigOrtmann/RIOT,mfrey/RIOT,brettswann/RIOT,kaleb-himes/RIOT,d00616/RIOT,katezilla/RIOT,lazytech-org/RIOT,kb2ma/RIOT,plushvoxel/RIOT,tfar/RIOT,rousselk/RIOT,roberthartung/RIOT,adjih/RIOT,zhuoshuguo/RIOT,altairpearl/RIOT,altairpearl/RIOT,ant9000/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,wentaoshang/RIOT,avmelnikoff/RIOT,hamilton-mote/RIOT-OS,LudwigKnuepfer/RIOT,TobiasFredersdorf/RIOT,rakendrathapa/RIOT,roberthartung/RIOT,lazytech-org/RIOT,A-Paul/RIOT,kYc0o/RIOT,neiljay/RIOT,biboc/RIOT,Hyungsin/RIOT-OS,miri64/RIOT,altairpearl/RIOT,brettswann/RIOT,jasonatran/RIOT,asanka-code/RIOT,OTAkeys/RIOT,tfar/RIOT,aeneby/RIOT,aeneby/RIOT,mtausig/RIOT,jbeyerstedt/RIOT-OTA-update,beurdouche/RIOT,mfrey/RIOT,hamilton-mote/RIOT-OS,katezilla/RIOT,biboc/RIOT,lazytech-org/RIOT,A-Paul/RIOT,adrianghc/RIOT,rfuentess/RIOT,syin2/RIOT,mtausig/RIOT,smlng/RIOT,kaleb-himes/RIOT,adrianghc/RIOT,miri64/RIOT,josephnoir/RIOT,neiljay/RIOT,avmelnikoff/RIOT,LudwigOrtmann/RIOT,kbumsik/RIOT,RIOT-OS/RIOT,asanka-code/RIOT,FrancescoErmini/RIOT,altairpearl/RIOT,neumodisch/RIOT,jbeyerstedt/RIOT-OTA-update,attdona/RIOT,asanka-code/RIOT,altairpearl/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,neiljay/RIOT,kaspar030/RIOT,jbeyerstedt/RIOT-OTA-update,kerneltask/RIOT,gautric/RIOT,katezilla/RIOT,brettswann/RIOT,LudwigOrtmann/RIOT,kbumsik/RIOT,gebart/RIOT,Josar/RIOT,x3ro/RIOT,authmillenon/RIOT,gebart/RIOT,yogo1212/RIOT,backenklee/RIOT,smlng/RIOT,syin2/RIOT,d00616/RIOT,RIOT-OS/RIOT,hamilton-mote/RIOT-OS,jbeyerstedt/RIOT-OTA-update,OTAkeys/RIOT,ant9000/RIOT,attdona/RIOT,A-Paul/RIOT,BytesGalore/RIOT,attdona/RIOT,cladmi/RIOT,toonst/RIOT,rakendrathapa/RIOT,MohmadAyman/RIOT,d00616/RIOT,asanka-code/RIOT,kerneltask/RIOT,roberthartung/RIOT,Josar/RIOT,x3ro/RIOT,thomaseichinger/RIOT,neumodisch/RIOT,kaspar030/RIOT,rajma996/RIOT,zhuoshuguo/RIOT,Ell-i/RIOT,brettswann/RIOT,kaspar030/RIOT,rakendrathapa/RIOT,MohmadAyman/RIOT,Josar/RIOT,Hyungsin/RIOT-OS,BytesGalore/RIOT,gebart/RIOT,LudwigKnuepfer/RIOT,LudwigKnuepfer/RIOT,kbumsik/RIOT,rousselk/RIOT,authmillenon/RIOT,kaleb-himes/RIOT,BytesGalore/RIOT,rfuentess/RIOT,rajma996/RIOT,alignan/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,LudwigOrtmann/RIOT,rakendrathapa/RIOT,x3ro/RIOT,smlng/RIOT,jremmert-phytec-iot/RIOT,d00616/RIOT,toonst/RIOT,thomaseichinger/RIOT,Hyungsin/RIOT-OS,yogo1212/RIOT,rakendrathapa/RIOT,jasonatran/RIOT,miri64/RIOT,smlng/RIOT,kaleb-himes/RIOT,jfischer-phytec-iot/RIOT,gebart/RIOT,beurdouche/RIOT,authmillenon/RIOT,ks156/RIOT,Ell-i/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,mtausig/RIOT,lazytech-org/RIOT,beurdouche/RIOT,beurdouche/RIOT,kerneltask/RIOT,wentaoshang/RIOT,dailab/RIOT,malosek/RIOT,avmelnikoff/RIOT,attdona/RIOT,rajma996/RIOT,TobiasFredersdorf/RIOT,rfuentess/RIOT,TobiasFredersdorf/RIOT,roberthartung/RIOT,BytesGalore/RIOT,thomaseichinger/RIOT,adrianghc/RIOT,basilfx/RIOT,jremmert-phytec-iot/RIOT,x3ro/RIOT,LudwigOrtmann/RIOT,basilfx/RIOT,OlegHahm/RIOT,rajma996/RIOT,ks156/RIOT,immesys/RiSyn,LudwigOrtmann/RIOT,FrancescoErmini/RIOT,kb2ma/RIOT,rajma996/RIOT,plushvoxel/RIOT,RIOT-OS/RIOT,jremmert-phytec-iot/RIOT,Ell-i/RIOT,backenklee/RIOT,asanka-code/RIOT,authmillenon/RIOT,dkm/RIOT,dkm/RIOT,alignan/RIOT,neumodisch/RIOT,backenklee/RIOT,hamilton-mote/RIOT-OS,authmillenon/RIOT,adrianghc/RIOT,jfischer-phytec-iot/RIOT,backenklee/RIOT,OlegHahm/RIOT,jbeyerstedt/RIOT-OTA-update,immesys/RiSyn,kaspar030/RIOT,ant9000/RIOT,dailab/RIOT,jasonatran/RIOT,wentaoshang/RIOT,kYc0o/RIOT,roberthartung/RIOT,basilfx/RIOT,miri64/RIOT,neiljay/RIOT,alignan/RIOT,dkm/RIOT,wentaoshang/RIOT,kb2ma/RIOT,neiljay/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,cladmi/RIOT,MohmadAyman/RIOT,rfuentess/RIOT,TobiasFredersdorf/RIOT,Hyungsin/RIOT-OS,attdona/RIOT,OTAkeys/RIOT,gautric/RIOT,rajma996/RIOT,rousselk/RIOT,mtausig/RIOT,malosek/RIOT