dist/tools/compile_test: fix flake8 issues
dist/tools/compile_test: fix flake8 issues

jasonatran/RIOT,mtausig/RIOT,authmillenon/RIOT,kbumsik/RIOT,authmillenon/RIOT,miri64/RIOT,yogo1212/RIOT,OTAkeys/RIOT,kaspar030/RIOT,josephnoir/RIOT,authmillenon/RIOT,smlng/RIOT,OlegHahm/RIOT,ant9000/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,ant9000/RIOT,gebart/RIOT,miri64/RIOT,kbumsik/RIOT,mfrey/RIOT,BytesGalore/RIOT,basilfx/RIOT,josephnoir/RIOT,kaspar030/RIOT,lazytech-org/RIOT,kYc0o/RIOT,smlng/RIOT,kYc0o/RIOT,mtausig/RIOT,x3ro/RIOT,BytesGalore/RIOT,kaspar030/RIOT,aeneby/RIOT,toonst/RIOT,avmelnikoff/RIOT,kbumsik/RIOT,lazytech-org/RIOT,kaspar030/RIOT,cladmi/RIOT,biboc/RIOT,smlng/RIOT,kbumsik/RIOT,jasonatran/RIOT,biboc/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,rfuentess/RIOT,BytesGalore/RIOT,aeneby/RIOT,toonst/RIOT,x3ro/RIOT,basilfx/RIOT,x3ro/RIOT,mfrey/RIOT,biboc/RIOT,aeneby/RIOT,lazytech-org/RIOT,mtausig/RIOT,yogo1212/RIOT,yogo1212/RIOT,yogo1212/RIOT,gebart/RIOT,rfuentess/RIOT,gebart/RIOT,jasonatran/RIOT,kYc0o/RIOT,kYc0o/RIOT,A-Paul/RIOT,BytesGalore/RIOT,RIOT-OS/RIOT,aeneby/RIOT,yogo1212/RIOT,basilfx/RIOT,smlng/RIOT,toonst/RIOT,kYc0o/RIOT,miri64/RIOT,avmelnikoff/RIOT,avmelnikoff/RIOT,mtausig/RIOT,ant9000/RIOT,x3ro/RIOT,yogo1212/RIOT,lazytech-org/RIOT,ant9000/RIOT,avmelnikoff/RIOT,kaspar030/RIOT,avmelnikoff/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,mfrey/RIOT,basilfx/RIOT,authmillenon/RIOT,miri64/RIOT,miri64/RIOT,jasonatran/RIOT,josephnoir/RIOT,gebart/RIOT,lazytech-org/RIOT,aeneby/RIOT,A-Paul/RIOT,RIOT-OS/RIOT,mfrey/RIOT,toonst/RIOT,jasonatran/RIOT,josephnoir/RIOT,toonst/RIOT,rfuentess/RIOT,cladmi/RIOT,OTAkeys/RIOT,A-Paul/RIOT,rfuentess/RIOT,mfrey/RIOT,basilfx/RIOT,smlng/RIOT,RIOT-OS/RIOT,kbumsik/RIOT,gebart/RIOT,A-Paul/RIOT,mtausig/RIOT,biboc/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,cladmi/RIOT,ant9000/RIOT,josephnoir/RIOT,cladmi/RIOT,OlegHahm/RIOT,biboc/RIOT,OTAkeys/RIOT,BytesGalore/RIOT,rfuentess/RIOT,cladmi/RIOT,A-Paul/RIOT,x3ro/RIOT