Update copy-libs.sh

Author: Jason2866

tools/copy-libs.sh

@@ -453,7 +453,7 @@ if [[ -n "$REL_INC" ]]; then
         if [[ "${rel_inc_array[$i]}" == "-iwithprefixbefore" ]]; then
             if [ $((i+1)) -lt ${#rel_inc_array[@]} ]; then
                 path="${rel_inc_array[$((i+1))]}"
-                echo "        \"$iwithprefix/include/$path\"," >> "$AR_PLATFORMIO_PY"
+                echo "        \"-iwithprefix/include/$path\"," >> "$AR_PLATFORMIO_PY"
                 i=$((i+2))
             else
                 i=$((i+1))