Revert "Skip ./circle-stdlib/libs/circle/boot (it fails) (#906)" (#954)

This reverts commit 1ec9cb2d40.

.github/workflows/build.yml

@@ -64,15 +64,11 @@ jobs:
         run: |
           set -ex
           export PATH=$(readlink -f ./gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf/bin):$PATH
-          # cd ./circle-stdlib/libs/circle/boot
-          # make
-          # make armstub64
-          # cd -
-          # cp -r ./circle-stdlib/libs/circle/boot/* sdcard
-          cd ./sdcard
-          wget https://github.com/probonopd/MiniDexed/releases/download/assets/boot.zip
-          unzip boot.zip && rm boot.zip
-          cd ..
+          cd ./circle-stdlib/libs/circle/boot
+          make
+          make armstub64
+          cd -
+          cp -r ./circle-stdlib/libs/circle/boot/* sdcard
           rm -rf sdcard/config*.txt sdcard/README sdcard/Makefile sdcard/armstub sdcard/COPYING.linux
           cp ./src/config.txt ./src/minidexed.ini ./src/performance.ini sdcard/
           cp ./getsysex.sh sdcard/