Switch to GitHub hosted compiler (#1128)

* test

* correct path

* switch to official repo

* is more cores faster?

* no, it isn't

* try mine again

* Fix path

* switch to official

* s

.github/workflows/build-firmware.yaml

@@ -86,9 +86,9 @@ jobs:
   
     # Build machines don't have arm-none-eabi gcc, so let's download it and put it on the path
     - name: Download & Install GCC
-      run: |
-        wget 'https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2019q4/RC2.1/gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2?revision=6e63531f-8cb1-40b9-bbfc-8a57cdfc01b4&la=en&hash=F761343D43A0587E8AC0925B723C04DBFB848339' -O compiler.tar.bz2
-        tar -xvf compiler.tar.bz2
+      run: | # Compiler hosted on our other git repo - avoids having to download from the nice folks at ARM every time
+        wget 'https://github.com/rusefi/build_support/raw/master/gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.xz' -O compiler.tar.xz
+        tar -xvf compiler.tar.xz
         echo "::add-path::`pwd`/gcc-arm-none-eabi-9-2019-q4-major/bin"
   
     # Make sure the compiler we just downloaded works - just print out the version