tests/pkg_micro-ecc-with-hwrng: Update CFLAGS
tests/pkg_micro-ecc-with-hwrng: Update CFLAGS

Remove deprecated FEATURES_PERIPH_HWRNG symbol

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