tests/irq: Add static to compilation-unit local variables
tests/irq: Add static to compilation-unit local variables

Yonezawa-T2/RIOT,rfuentess/RIOT,attdona/RIOT,LudwigOrtmann/RIOT,brettswann/RIOT,plushvoxel/RIOT,plushvoxel/RIOT,kaspar030/RIOT,Josar/RIOT,biboc/RIOT,authmillenon/RIOT,Josar/RIOT,adjih/RIOT,brettswann/RIOT,rakendrathapa/RIOT,malosek/RIOT,adjih/RIOT,katezilla/RIOT,backenklee/RIOT,jfischer-phytec-iot/RIOT,Josar/RIOT,backenklee/RIOT,brettswann/RIOT,jfischer-phytec-iot/RIOT,altairpearl/RIOT,rousselk/RIOT,biboc/RIOT,OTAkeys/RIOT,Hyungsin/RIOT-OS,MohmadAyman/RIOT,syin2/RIOT,ant9000/RIOT,authmillenon/RIOT,kaleb-himes/RIOT,attdona/RIOT,basilfx/RIOT,cladmi/RIOT,neiljay/RIOT,thomaseichinger/RIOT,biboc/RIOT,x3ro/RIOT,adrianghc/RIOT,kb2ma/RIOT,ant9000/RIOT,jremmert-phytec-iot/RIOT,zhuoshuguo/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kerneltask/RIOT,avmelnikoff/RIOT,neumodisch/RIOT,attdona/RIOT,TobiasFredersdorf/RIOT,malosek/RIOT,plushvoxel/RIOT,ks156/RIOT,shady33/RIOT,thomaseichinger/RIOT,kerneltask/RIOT,asanka-code/RIOT,A-Paul/RIOT,josephnoir/RIOT,kYc0o/RIOT,tfar/RIOT,rajma996/RIOT,kaspar030/RIOT,jremmert-phytec-iot/RIOT,jbeyerstedt/RIOT-OTA-update,MohmadAyman/RIOT,toonst/RIOT,toonst/RIOT,TobiasFredersdorf/RIOT,gautric/RIOT,rajma996/RIOT,rfuentess/RIOT,shady33/RIOT,avmelnikoff/RIOT,Hyungsin/RIOT-OS,neiljay/RIOT,x3ro/RIOT,mfrey/RIOT,attdona/RIOT,hamilton-mote/RIOT-OS,kaleb-himes/RIOT,shady33/RIOT,attdona/RIOT,wentaoshang/RIOT,Hyungsin/RIOT-OS,Yonezawa-T2/RIOT,malosek/RIOT,ant9000/RIOT,gautric/RIOT,syin2/RIOT,jfischer-phytec-iot/RIOT,FrancescoErmini/RIOT,yogo1212/RIOT,rousselk/RIOT,attdona/RIOT,toonst/RIOT,lazytech-org/RIOT,LudwigKnuepfer/RIOT,TobiasFredersdorf/RIOT,OTAkeys/RIOT,jbeyerstedt/RIOT-OTA-update,mfrey/RIOT,OlegHahm/RIOT,x3ro/RIOT,Ell-i/RIOT,dailab/RIOT,yogo1212/RIOT,rfuentess/RIOT,mfrey/RIOT,toonst/RIOT,gebart/RIOT,FrancescoErmini/RIOT,backenklee/RIOT,basilfx/RIOT,Hyungsin/RIOT-OS,asanka-code/RIOT,RIOT-OS/RIOT,MohmadAyman/RIOT,kYc0o/RIOT,Yonezawa-T2/RIOT,smlng/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,beurdouche/RIOT,cladmi/RIOT,adrianghc/RIOT,miri64/RIOT,neumodisch/RIOT,OlegHahm/RIOT,wentaoshang/RIOT,Yonezawa-T2/RIOT,rajma996/RIOT,mtausig/RIOT,thomaseichinger/RIOT,jasonatran/RIOT,Ell-i/RIOT,beurdouche/RIOT,dkm/RIOT,dailab/RIOT,kbumsik/RIOT,A-Paul/RIOT,tfar/RIOT,Josar/RIOT,immesys/RiSyn,BytesGalore/RIOT,basilfx/RIOT,dkm/RIOT,A-Paul/RIOT,jasonatran/RIOT,adjih/RIOT,RIOT-OS/RIOT,shady33/RIOT,zhuoshuguo/RIOT,wentaoshang/RIOT,gebart/RIOT,adrianghc/RIOT,MohmadAyman/RIOT,hamilton-mote/RIOT-OS,ks156/RIOT,smlng/RIOT,kbumsik/RIOT,josephnoir/RIOT,avmelnikoff/RIOT,toonst/RIOT,beurdouche/RIOT,syin2/RIOT,BytesGalore/RIOT,avmelnikoff/RIOT,authmillenon/RIOT,x3ro/RIOT,immesys/RiSyn,LudwigOrtmann/RIOT,ks156/RIOT,jbeyerstedt/RIOT-OTA-update,d00616/RIOT,katezilla/RIOT,lazytech-org/RIOT,rakendrathapa/RIOT,hamilton-mote/RIOT-OS,Yonezawa-T2/RIOT,OlegHahm/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,neumodisch/RIOT,brettswann/RIOT,Ell-i/RIOT,LudwigKnuepfer/RIOT,authmillenon/RIOT,gebart/RIOT,dailab/RIOT,neiljay/RIOT,neumodisch/RIOT,ks156/RIOT,kaspar030/RIOT,rakendrathapa/RIOT,malosek/RIOT,miri64/RIOT,alignan/RIOT,syin2/RIOT,lazytech-org/RIOT,yogo1212/RIOT,katezilla/RIOT,asanka-code/RIOT,kaleb-himes/RIOT,jfischer-phytec-iot/RIOT,FrancescoErmini/RIOT,wentaoshang/RIOT,x3ro/RIOT,rajma996/RIOT,miri64/RIOT,LudwigKnuepfer/RIOT,mtausig/RIOT,kbumsik/RIOT,dkm/RIOT,BytesGalore/RIOT,jfischer-phytec-iot/RIOT,hamilton-mote/RIOT-OS,kYc0o/RIOT,authmillenon/RIOT,MohmadAyman/RIOT,wentaoshang/RIOT,RIOT-OS/RIOT,altairpearl/RIOT,gautric/RIOT,LudwigOrtmann/RIOT,Josar/RIOT,gautric/RIOT,immesys/RiSyn,rfuentess/RIOT,miri64/RIOT,kb2ma/RIOT,biboc/RIOT,dailab/RIOT,kaleb-himes/RIOT,immesys/RiSyn,rousselk/RIOT,roberthartung/RIOT,aeneby/RIOT,avmelnikoff/RIOT,TobiasFredersdorf/RIOT,josephnoir/RIOT,jbeyerstedt/RIOT-OTA-update,wentaoshang/RIOT,altairpearl/RIOT,altairpearl/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,yogo1212/RIOT,thomaseichinger/RIOT,LudwigKnuepfer/RIOT,plushvoxel/RIOT,katezilla/RIOT,lazytech-org/RIOT,thomaseichinger/RIOT,Ell-i/RIOT,roberthartung/RIOT,syin2/RIOT,ks156/RIOT,RIOT-OS/RIOT,cladmi/RIOT,mtausig/RIOT,LudwigOrtmann/RIOT,gebart/RIOT,OTAkeys/RIOT,aeneby/RIOT,kYc0o/RIOT,kYc0o/RIOT,mfrey/RIOT,dailab/RIOT,immesys/RiSyn,jremmert-phytec-iot/RIOT,rousselk/RIOT,d00616/RIOT,OlegHahm/RIOT,rajma996/RIOT,plushvoxel/RIOT,backenklee/RIOT,ant9000/RIOT,jasonatran/RIOT,katezilla/RIOT,zhuoshuguo/RIOT,A-Paul/RIOT,mtausig/RIOT,aeneby/RIOT,d00616/RIOT,mfrey/RIOT,dkm/RIOT,kaspar030/RIOT,brettswann/RIOT,OTAkeys/RIOT,FrancescoErmini/RIOT,kaspar030/RIOT,rajma996/RIOT,immesys/RiSyn,zhuoshuguo/RIOT,asanka-code/RIOT,aeneby/RIOT,jasonatran/RIOT,kerneltask/RIOT,lazytech-org/RIOT,adjih/RIOT,josephnoir/RIOT,adjih/RIOT,roberthartung/RIOT,OlegHahm/RIOT,rakendrathapa/RIOT,tfar/RIOT,smlng/RIOT,BytesGalore/RIOT,FrancescoErmini/RIOT,ant9000/RIOT,jasonatran/RIOT,authmillenon/RIOT,rousselk/RIOT,dkm/RIOT,kbumsik/RIOT,basilfx/RIOT,kaleb-himes/RIOT,biboc/RIOT,OTAkeys/RIOT,kerneltask/RIOT,shady33/RIOT,malosek/RIOT,rakendrathapa/RIOT,kb2ma/RIOT,BytesGalore/RIOT,tfar/RIOT,brettswann/RIOT,TobiasFredersdorf/RIOT,cladmi/RIOT,roberthartung/RIOT,backenklee/RIOT,neiljay/RIOT,malosek/RIOT,shady33/RIOT,d00616/RIOT,gautric/RIOT,yogo1212/RIOT,kerneltask/RIOT,aeneby/RIOT,neiljay/RIOT,kb2ma/RIOT,zhuoshuguo/RIOT,rakendrathapa/RIOT,LudwigOrtmann/RIOT,Hyungsin/RIOT-OS,alignan/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,A-Paul/RIOT,adrianghc/RIOT,basilfx/RIOT,miri64/RIOT,tfar/RIOT,cladmi/RIOT,Yonezawa-T2/RIOT,neumodisch/RIOT,jremmert-phytec-iot/RIOT,Ell-i/RIOT,jremmert-phytec-iot/RIOT,rfuentess/RIOT,d00616/RIOT,hamilton-mote/RIOT-OS,josephnoir/RIOT,MohmadAyman/RIOT,smlng/RIOT,jbeyerstedt/RIOT-OTA-update,jremmert-phytec-iot/RIOT,adrianghc/RIOT,smlng/RIOT,mtausig/RIOT,roberthartung/RIOT,zhuoshuguo/RIOT,beurdouche/RIOT,kbumsik/RIOT,altairpearl/RIOT,rousselk/RIOT,LudwigOrtmann/RIOT,alignan/RIOT,beurdouche/RIOT,asanka-code/RIOT,altairpearl/RIOT,neumodisch/RIOT,LudwigKnuepfer/RIOT,asanka-code/RIOT,d00616/RIOT,kb2ma/RIOT,yogo1212/RIOT,gebart/RIOT,alignan/RIOT,alignan/RIOT,RIOT-OS/RIOT,FrancescoErmini/RIOT