message: Update arm_gcc_download.sh
diff: @@ -55,7 +55,7 @@ else
  EXPECTED_MD5="8312c4c91799885f222f663fc81f9a31"
  elif [ ${UNAME_S} == Darwin ]; then
  GCC_URL="https://developer.arm.com/-/media/Files/downloads/gnu-rm/10-2020q4/gcc-arm-none-eabi-10-2020-q4-major-mac.tar.bz2"
  - EXPECTED_MD5="bc8ae26d7c429f30d583a605a4bcf9bc"
  + EXPECTED_MD5="e588d21be5a0cc9caa60938d2422b058"
  else
  echo "OS type ${UNAME_S} not supported."
  exit 1
  