Pull request: all: fix race, imp scripts

Merge in DNS/adguard-home from fix-race to master

Squashed commit of the following:

commit dff47c707554f689cf131e0ab3fe05df4e4b6a51
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri May 21 19:12:06 2021 +0300

    all: fix race, imp scripts

scripts/make/clean.sh

@@ -11,9 +11,8 @@ fi
 set -e -f -u
 
 dist_dir="$DIST_DIR"
-go="${GO:-go}"
 sudo_cmd="${SUDO:-}"
-readonly dist_dir go sudo_cmd
+readonly dist_dir sudo_cmd
 
 $sudo_cmd rm -f\
 	./AdGuardHome\