unittests/tests-pkt: fixed header file include guard
unittests/tests-pkt: fixed header file include guard

fixes #2623
plushvoxel/RIOT,rfuentess/RIOT,haoyangyu/RIOT,abp719/RIOT,asanka-code/RIOT,miri64/RIOT,LudwigKnuepfer/RIOT,altairpearl/RIOT,phiros/RIOT,yogo1212/RIOT,x3ro/RIOT,gbarnett/RIOT,stevenj/RIOT,neiljay/RIOT,kushalsingh007/RIOT,FrancescoErmini/RIOT,rfswarm/RIOT,DipSwitch/RIOT,authmillenon/RIOT,gautric/RIOT,hamilton-mote/RIOT-OS,mfrey/RIOT,shady33/RIOT,RIOT-OS/RIOT,RBartz/RIOT,kbumsik/RIOT,OlegHahm/RIOT,plushvoxel/RIOT,bartfaizoltan/RIOT,malosek/RIOT,A-Paul/RIOT,neiljay/RIOT,kbumsik/RIOT,fnack/RIOT,asanka-code/RIOT,basilfx/RIOT,koenning/RIOT,jbeyerstedt/RIOT-OTA-update,RBartz/RIOT,mziegert/RIOT,adjih/RIOT,jferreir/RIOT,luciotorre/RIOT,EmuxEvans/RIOT,shady33/RIOT,kb2ma/RIOT,miri64/RIOT,gebart/RIOT,chris-wood/RIOT,Hyungsin/RIOT-OS,wentaoshang/RIOT,kb2ma/RIOT,yogo1212/RIOT,latsku/RIOT,rfuentess/RIOT,syin2/RIOT,tfar/RIOT,roberthartung/RIOT,MohmadAyman/RIOT,katezilla/RIOT,toonst/RIOT,bartfaizoltan/RIOT,ThanhVic/RIOT,ThanhVic/RIOT,EmuxEvans/RIOT,JensErdmann/RIOT,altairpearl/RIOT,binarylemon/RIOT,tfar/RIOT,bartfaizoltan/RIOT,Lexandro92/RIOT-CoAP,alignan/RIOT,dailab/RIOT,mziegert/RIOT,sgso/RIOT,luciotorre/RIOT,TobiasFredersdorf/RIOT,abp719/RIOT,stevenj/RIOT,abkam07/RIOT,smlng/RIOT,RBartz/RIOT,alignan/RIOT,ntrtrung/RIOT,gbarnett/RIOT,beurdouche/RIOT,watr-li/RIOT,brettswann/RIOT,openkosmosorg/RIOT,Yonezawa-T2/RIOT,binarylemon/RIOT,kaspar030/RIOT,MohmadAyman/RIOT,arvindpdmn/RIOT,neumodisch/RIOT,backenklee/RIOT,thiagohd/RIOT,sumanpanchal/RIOT,malosek/RIOT,JensErdmann/RIOT,MarkXYang/RIOT,x3ro/RIOT,JensErdmann/RIOT,OTAkeys/RIOT,phiros/RIOT,adjih/RIOT,kYc0o/RIOT,Osblouf/RIOT,fnack/RIOT,shady33/RIOT,jremmert-phytec-iot/RIOT,centurysys/RIOT,hamilton-mote/RIOT-OS,wentaoshang/RIOT,adrianghc/RIOT,thiagohd/RIOT,lazytech-org/RIOT,A-Paul/RIOT,chris-wood/RIOT,Josar/RIOT,LudwigKnuepfer/RIOT,LudwigOrtmann/RIOT,avmelnikoff/RIOT,changbiao/RIOT,MohmadAyman/RIOT,ant9000/RIOT,Darredevil/RIOT,FrancescoErmini/RIOT,rakendrathapa/RIOT,Hyungsin/RIOT-OS,ant9000/RIOT,patkan/RIOT,kerneltask/RIOT,Hyungsin/RIOT-OS,DipSwitch/RIOT,msolters/RIOT,dailab/RIOT,yogo1212/RIOT,phiros/RIOT,stevenj/RIOT,automote/RIOT,ThanhVic/RIOT,A-Paul/RIOT,Lexandro92/RIOT-CoAP,benoit-canet/RIOT,ant9000/RIOT,jfischer-phytec-iot/RIOT,alignan/RIOT,adrianghc/RIOT,adjih/RIOT,rajma996/RIOT,stevenj/RIOT,watr-li/RIOT,stevenj/RIOT,thomaseichinger/RIOT,jasonatran/RIOT,alex1818/RIOT,kaspar030/RIOT,roberthartung/RIOT,syin2/RIOT,DipSwitch/RIOT,latsku/RIOT,ks156/RIOT,EmuxEvans/RIOT,daniel-k/RIOT,attdona/RIOT,ximus/RIOT,DipSwitch/RIOT,openkosmosorg/RIOT,jferreir/RIOT,ximus/RIOT,lebrush/RIOT,EmuxEvans/RIOT,khhhh/RIOT,EmuxEvans/RIOT,neiljay/RIOT,ntrtrung/RIOT,TobiasFredersdorf/RIOT,FrancescoErmini/RIOT,tdautc19841202/RIOT,Ell-i/RIOT,attdona/RIOT,patkan/RIOT,kb2ma/RIOT,fnack/RIOT,beurdouche/RIOT,dkm/RIOT,sgso/RIOT,mziegert/RIOT,asanka-code/RIOT,rajma996/RIOT,miri64/RIOT,ximus/RIOT,FrancescoErmini/RIOT,MohmadAyman/RIOT,l3nko/RIOT,wentaoshang/RIOT,Josar/RIOT,tfar/RIOT,OTAkeys/RIOT,abp719/RIOT,MohmadAyman/RIOT,automote/RIOT,shady33/RIOT,toonst/RIOT,l3nko/RIOT,patkan/RIOT,koenning/RIOT,rousselk/RIOT,openkosmosorg/RIOT,alignan/RIOT,thomaseichinger/RIOT,ThanhVic/RIOT,herrfz/RIOT,jremmert-phytec-iot/RIOT,avmelnikoff/RIOT,kbumsik/RIOT,RIOT-OS/RIOT,LudwigKnuepfer/RIOT,l3nko/RIOT,ks156/RIOT,chris-wood/RIOT,shady33/RIOT,RBartz/RIOT,basilfx/RIOT,FrancescoErmini/RIOT,aeneby/RIOT,bartfaizoltan/RIOT,backenklee/RIOT,JensErdmann/RIOT,rousselk/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,kerneltask/RIOT,adrianghc/RIOT,MarkXYang/RIOT,khhhh/RIOT,automote/RIOT,zhuoshuguo/RIOT,haoyangyu/RIOT,lebrush/RIOT,alex1818/RIOT,yogo1212/RIOT,aeneby/RIOT,biboc/RIOT,rfuentess/RIOT,kYc0o/RIOT,Hyungsin/RIOT-OS,toonst/RIOT,latsku/RIOT,yogo1212/RIOT,fnack/RIOT,A-Paul/RIOT,katezilla/RIOT,gautric/RIOT,khhhh/RIOT,sgso/RIOT,d00616/RIOT,msolters/RIOT,haoyangyu/RIOT,neumodisch/RIOT,changbiao/RIOT,adrianghc/RIOT,dhruvvyas90/RIOT,plushvoxel/RIOT,backenklee/RIOT,daniel-k/RIOT,DipSwitch/RIOT,gebart/RIOT,msolters/RIOT,cladmi/RIOT,centurysys/RIOT,alex1818/RIOT,RIOT-OS/RIOT,alex1818/RIOT,aeneby/RIOT,rajma996/RIOT,daniel-k/RIOT,koenning/RIOT,marcosalm/RIOT,plushvoxel/RIOT,Yonezawa-T2/RIOT,attdona/RIOT,binarylemon/RIOT,Lexandro92/RIOT-CoAP,alignan/RIOT,RubikonAlpha/RIOT,robixnai/RIOT,katezilla/RIOT,kaleb-himes/RIOT,mziegert/RIOT,centurysys/RIOT,LudwigKnuepfer/RIOT,brettswann/RIOT,arvindpdmn/RIOT,cladmi/RIOT,abkam07/RIOT,ant9000/RIOT,latsku/RIOT,rfswarm/RIOT,rajma996/RIOT,attdona/RIOT,shady33/RIOT,smlng/RIOT,Ell-i/RIOT,zhuoshuguo/RIOT,rfswarm/RIOT,RubikonAlpha/RIOT,gbarnett/RIOT,MarkXYang/RIOT,herrfz/RIOT-old,dhruvvyas90/RIOT,LudwigOrtmann/RIOT,Lexandro92/RIOT-CoAP,gautric/RIOT,syin2/RIOT,kaleb-himes/RIOT,biboc/RIOT,fnack/RIOT,brettswann/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,phiros/RIOT,mtausig/RIOT,jbeyerstedt/RIOT-OTA-update,immesys/RiSyn,kushalsingh007/RIOT,aeneby/RIOT,latsku/RIOT,RubikonAlpha/RIOT,ximus/RIOT,centurysys/RIOT,gebart/RIOT,kaspar030/RIOT,abkam07/RIOT,BytesGalore/RIOT,tfar/RIOT,lebrush/RIOT,jasonatran/RIOT,automote/RIOT,ximus/RIOT,ntrtrung/RIOT,FrancescoErmini/RIOT,alex1818/RIOT,dkm/RIOT,luciotorre/RIOT,lebrush/RIOT,immesys/RiSyn,altairpearl/RIOT,gbarnett/RIOT,Ell-i/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,chris-wood/RIOT,watr-li/RIOT,latsku/RIOT,biboc/RIOT,haoyangyu/RIOT,Lexandro92/RIOT-CoAP,asanka-code/RIOT,d00616/RIOT,Josar/RIOT,OlegHahm/RIOT,daniel-k/RIOT,zhuoshuguo/RIOT,jferreir/RIOT,jfischer-phytec-iot/RIOT,hamilton-mote/RIOT-OS,rakendrathapa/RIOT,koenning/RIOT,tdautc19841202/RIOT,altairpearl/RIOT,jferreir/RIOT,immesys/RiSyn,Osblouf/RIOT,sgso/RIOT,Osblouf/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,lebrush/RIOT,jremmert-phytec-iot/RIOT,msolters/RIOT,kYc0o/RIOT,ntrtrung/RIOT,OlegHahm/RIOT,gbarnett/RIOT,jferreir/RIOT,MonsterCode8000/RIOT,authmillenon/RIOT,robixnai/RIOT,authmillenon/RIOT,khhhh/RIOT,haoyangyu/RIOT,fnack/RIOT,EmuxEvans/RIOT,josephnoir/RIOT,kushalsingh007/RIOT,kaspar030/RIOT,ks156/RIOT,Lexandro92/RIOT-CoAP,rousselk/RIOT,rfswarm/RIOT,koenning/RIOT,gautric/RIOT,plushvoxel/RIOT,khhhh/RIOT,daniel-k/RIOT,koenning/RIOT,phiros/RIOT,kaleb-himes/RIOT,Hyungsin/RIOT-OS,neumodisch/RIOT,roberthartung/RIOT,dailab/RIOT,altairpearl/RIOT,abkam07/RIOT,TobiasFredersdorf/RIOT,arvindpdmn/RIOT,abkam07/RIOT,rfswarm/RIOT,rakendrathapa/RIOT,alex1818/RIOT,rfuentess/RIOT,basilfx/RIOT,gautric/RIOT,watr-li/RIOT,roberthartung/RIOT,rakendrathapa/RIOT,TobiasFredersdorf/RIOT,Osblouf/RIOT,kbumsik/RIOT,kerneltask/RIOT,rajma996/RIOT,BytesGalore/RIOT,lazytech-org/RIOT,herrfz/RIOT,mfrey/RIOT,cladmi/RIOT,PSHIVANI/Riot-Code,yogo1212/RIOT,lazytech-org/RIOT,zhuoshuguo/RIOT,altairpearl/RIOT,RIOT-OS/RIOT,kaleb-himes/RIOT,MonsterCode8000/RIOT,sumanpanchal/RIOT,dhruvvyas90/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,arvindpdmn/RIOT,malosek/RIOT,kushalsingh007/RIOT,sumanpanchal/RIOT,mtausig/RIOT,herrfz/RIOT,authmillenon/RIOT,RubikonAlpha/RIOT,dkm/RIOT,dhruvvyas90/RIOT,herrfz/RIOT,A-Paul/RIOT,dailab/RIOT,zhuoshuguo/RIOT,RBartz/RIOT,herrfz/RIOT-old,luciotorre/RIOT,mfrey/RIOT,patkan/RIOT,changbiao/RIOT,authmillenon/RIOT,PSHIVANI/Riot-Code,thiagohd/RIOT,toonst/RIOT,abkam07/RIOT,herrfz/RIOT,mziegert/RIOT,authmillenon/RIOT,MonsterCode8000/RIOT,biboc/RIOT,jasonatran/RIOT,immesys/RiSyn,luciotorre/RIOT,PSHIVANI/Riot-Code,RubikonAlpha/RIOT,msolters/RIOT,Darredevil/RIOT,syin2/RIOT,katezilla/RIOT,BytesGalore/RIOT,mtausig/RIOT,MarkXYang/RIOT,wentaoshang/RIOT,ks156/RIOT,ntrtrung/RIOT,mtausig/RIOT,d00616/RIOT,l3nko/RIOT,RubikonAlpha/RIOT,beurdouche/RIOT,arvindpdmn/RIOT,mfrey/RIOT,patkan/RIOT,benoit-canet/RIOT,herrfz/RIOT,l3nko/RIOT,tfar/RIOT,jfischer-phytec-iot/RIOT,gbarnett/RIOT,OTAkeys/RIOT,adjih/RIOT,rfswarm/RIOT,mziegert/RIOT,gebart/RIOT,rajma996/RIOT,sumanpanchal/RIOT,jremmert-phytec-iot/RIOT,kaleb-himes/RIOT,syin2/RIOT,changbiao/RIOT,openkosmosorg/RIOT,changbiao/RIOT,LudwigOrtmann/RIOT,jfischer-phytec-iot/RIOT,thiagohd/RIOT,ThanhVic/RIOT,kb2ma/RIOT,robixnai/RIOT,MarkXYang/RIOT,neiljay/RIOT,smlng/RIOT,Darredevil/RIOT,x3ro/RIOT,centurysys/RIOT,d00616/RIOT,ant9000/RIOT,OlegHahm/RIOT,abp719/RIOT,thomaseichinger/RIOT,neumodisch/RIOT,haoyangyu/RIOT,neumodisch/RIOT,MonsterCode8000/RIOT,josephnoir/RIOT,benoit-canet/RIOT,rakendrathapa/RIOT,avmelnikoff/RIOT,toonst/RIOT,lazytech-org/RIOT,Josar/RIOT,herrfz/RIOT-old,avmelnikoff/RIOT,PSHIVANI/Riot-Code,attdona/RIOT,centurysys/RIOT,chris-wood/RIOT,dhruvvyas90/RIOT,biboc/RIOT,malosek/RIOT,malosek/RIOT,dhruvvyas90/RIOT,cladmi/RIOT,jremmert-phytec-iot/RIOT,Osblouf/RIOT,neiljay/RIOT,robixnai/RIOT,l3nko/RIOT,rousselk/RIOT,benoit-canet/RIOT,RBartz/RIOT,kerneltask/RIOT,JensErdmann/RIOT,zhuoshuguo/RIOT,arvindpdmn/RIOT,asanka-code/RIOT,hamilton-mote/RIOT-OS,Darredevil/RIOT,openkosmosorg/RIOT,hamilton-mote/RIOT-OS,binarylemon/RIOT,jferreir/RIOT,kYc0o/RIOT,herrfz/RIOT-old,lazytech-org/RIOT,LudwigKnuepfer/RIOT,wentaoshang/RIOT,kerneltask/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,sgso/RIOT,katezilla/RIOT,patkan/RIOT,kushalsingh007/RIOT,jremmert-phytec-iot/RIOT,JensErdmann/RIOT,jbeyerstedt/RIOT-OTA-update,MonsterCode8000/RIOT,bartfaizoltan/RIOT,dkm/RIOT,khhhh/RIOT,smlng/RIOT,benoit-canet/RIOT,kbumsik/RIOT,stevenj/RIOT,binarylemon/RIOT,MohmadAyman/RIOT,LudwigOrtmann/RIOT,rousselk/RIOT,dailab/RIOT,neumodisch/RIOT,sumanpanchal/RIOT,PSHIVANI/Riot-Code,kb2ma/RIOT,Darredevil/RIOT,d00616/RIOT,x3ro/RIOT,jfischer-phytec-iot/RIOT,immesys/RiSyn,BytesGalore/RIOT,LudwigOrtmann/RIOT,ks156/RIOT,smlng/RIOT,jasonatran/RIOT,openkosmosorg/RIOT,Yonezawa-T2/RIOT,d00616/RIOT,mfrey/RIOT,luciotorre/RIOT,aeneby/RIOT,brettswann/RIOT,adjih/RIOT,rakendrathapa/RIOT,tdautc19841202/RIOT,MonsterCode8000/RIOT,watr-li/RIOT,adrianghc/RIOT,backenklee/RIOT,Yonezawa-T2/RIOT,abp719/RIOT,automote/RIOT,watr-li/RIOT,Darredevil/RIOT,MarkXYang/RIOT,malosek/RIOT,tdautc19841202/RIOT,msolters/RIOT,roberthartung/RIOT,BytesGalore/RIOT,TobiasFredersdorf/RIOT,robixnai/RIOT,Yonezawa-T2/RIOT,jbeyerstedt/RIOT-OTA-update,changbiao/RIOT,basilfx/RIOT,sgso/RIOT,ximus/RIOT,automote/RIOT,thomaseichinger/RIOT,brettswann/RIOT,dkm/RIOT,daniel-k/RIOT,gebart/RIOT,backenklee/RIOT,x3ro/RIOT,immesys/RiSyn,PSHIVANI/Riot-Code,DipSwitch/RIOT,kaspar030/RIOT,marcosalm/RIOT,Yonezawa-T2/RIOT,Josar/RIOT,josephnoir/RIOT,ntrtrung/RIOT,lebrush/RIOT,thomaseichinger/RIOT,sumanpanchal/RIOT,Ell-i/RIOT,phiros/RIOT,marcosalm/RIOT,wentaoshang/RIOT,binarylemon/RIOT,thiagohd/RIOT,OTAkeys/RIOT,basilfx/RIOT,mtausig/RIOT,tdautc19841202/RIOT,jbeyerstedt/RIOT-OTA-update,brettswann/RIOT,rousselk/RIOT,beurdouche/RIOT,Osblouf/RIOT,ThanhVic/RIOT,chris-wood/RIOT,attdona/RIOT,josephnoir/RIOT,kYc0o/RIOT,beurdouche/RIOT,cladmi/RIOT,benoit-canet/RIOT,marcosalm/RIOT,thiagohd/RIOT,LudwigOrtmann/RIOT,miri64/RIOT,kushalsingh007/RIOT,marcosalm/RIOT,Ell-i/RIOT,asanka-code/RIOT,robixnai/RIOT,avmelnikoff/RIOT,miri64/RIOT,josephnoir/RIOT,rfuentess/RIOT,jasonatran/RIOT,marcosalm/RIOT,herrfz/RIOT-old,tdautc19841202/RIOT,RIOT-OS/RIOT,bartfaizoltan/RIOT,abp719/RIOT