no full clone of hosted mcu repo

Author: Jason2866

tools/compile_slave.sh

@@ -12,8 +12,9 @@ source ./tools/install-esp-idf.sh
 if [ $? -ne 0 ]; then exit 1; fi
 
 # use fork until upstream bugs are fixed
-git clone https://github.com/Jason2866/esp-hosted-mcu.git
-cd esp-hosted-mcu/slave
+git clone --depth 1 https://github.com/Jason2866/esp-hosted-mcu.git || {
+  echo "Failed to clone esp-hosted-mcu"; exit 1; }
+cd esp-hosted-mcu/slave || exit 1
 mkdir wifi_copro_fw
 
 slave_targets=(