Run "brew update" before installing avr-gcc
As suggested by:
https://github.com/osx-cross/homebrew-avr/issues/205#issuecomment-760637996
diff --git a/cibuild.sh b/cibuild.sh
index 5b627b1..9b83f2b 100755
--- a/cibuild.sh
+++ b/cibuild.sh
@@ -40,6 +40,8 @@
install="python-tools u-boot-tools elf-toolchain gen-romfs kconfig-frontends arm-gcc-toolchain riscv-gcc-toolchain xtensa-esp32-gcc-toolchain avr-gcc-toolchain c-cache binutils"
mkdir -p ${prebuilt}/homebrew
export HOMEBREW_CACHE=${prebuilt}/homebrew
+ # https://github.com/osx-cross/homebrew-avr/issues/205#issuecomment-760637996
+ brew update
;;
Linux)
install="python-tools gen-romfs gperf kconfig-frontends arm-gcc-toolchain mips-gcc-toolchain riscv-gcc-toolchain xtensa-esp32-gcc-toolchain rx-gcc-toolchain c-cache"
