Update config.sh

Author: Jason2866

tools/config.sh

@@ -52,6 +52,7 @@ AR_COMPS="$AR_ROOT/components"
 AR_MANAGED_COMPS="$AR_ROOT/managed_components"
 AR_OUT="$AR_ROOT/out"
 AR_TOOLS="$AR_OUT/tools"
+AR_PATCHES="$AR_ROOT/patches"
 AR_PLATFORM_TXT="$AR_OUT/platform.txt"
 AR_GEN_PART_PY="$AR_TOOLS/gen_esp32part.py"
 AR_SDK="$AR_TOOLS/esp32-arduino-libs/$IDF_TARGET"