HOTFIX:Backport Memory corruption due to stack coloring overreach
HOTFIX:Backport Memory corruption due to stack coloring overreach

   Backport of upstream NuttX PR 264

   As discovered by dcabecinhas. This fix assume the 8 byte
   alignment options for size stack size or this will overwrite
   the first word after TOS
   See https://github.com/PX4/Firmware/issues/6613#issuecomment-285869778

jlecoeur/Firmware,jlecoeur/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,dagar/Firmware,Aerotenna/Firmware,PX4/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,acfloria/Firmware,Aerotenna/Firmware,PX4/Firmware,mcgill-robotics/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,dagar/Firmware,dagar/Firmware,Aerotenna/Firmware,krbeverx/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,jlecoeur/Firmware,krbeverx/Firmware,Aerotenna/Firmware,mcgill-robotics/Firmware,mcgill-robotics/Firmware,PX4/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,jlecoeur/Firmware,acfloria/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,mje-nz/PX4-Firmware,krbeverx/Firmware,Aerotenna/Firmware,mcgill-robotics/Firmware,krbeverx/Firmware,acfloria/Firmware,acfloria/Firmware,Aerotenna/Firmware,krbeverx/Firmware,acfloria/Firmware,krbeverx/Firmware,dagar/Firmware,mcgill-robotics/Firmware,dagar/Firmware,dagar/Firmware