Update ARM GCC on macOS to 8.3 (#7318)

diff --git a/util/macos_install.sh b/util/macos_install.sh
index c5c27d1..f993003 100755 (executable)
--- a/util/macos_install.sh
+++ b/util/macos_install.sh
@@ -22,8 +22,8 @@ if ! brew --version >/dev/null 2>&1; then
 fi
 
 brew tap osx-cross/avr
-brew tap PX4/homebrew-px4
+brew tap osx-cross/arm
 brew update
-brew install avr-gcc@8 gcc-arm-none-eabi dfu-programmer avrdude clang-format dfu-util python3
+brew install avr-gcc@8 arm-gcc-bin dfu-programmer avrdude clang-format dfu-util python3
 brew link --force avr-gcc@8
 pip3 install -r "${util_dir}/../requirements.txt"