tools.func: fix invalid find -prune/-delete combination breaking CLEAN_INSTALL

misc/tools.func

@@ -2542,7 +2542,7 @@ _deploy_source_tarball() {
 
   mkdir -p "$target"
   if [[ "${CLEAN_INSTALL:-0}" == "1" ]]; then
-    find "${target:?}" -mindepth 1 \( -type d -exec mountpoint -q {} \; -prune \) -o -delete
+    find "${target:?}" -mindepth 1 \( -type d -exec mountpoint -q {} \; -prune \) -o -print0 | xargs -0 rm -rf --
   fi
 
   tar --no-same-owner -xzf "$tarball" -C "$workdir" || {
@@ -2631,7 +2631,7 @@ _deploy_unpacked_archive() {
   # was truncated, the archive was unreadable, or it unpacked to nothing.
   mkdir -p "$target"
   if [[ "${CLEAN_INSTALL:-0}" == "1" ]]; then
-    find "${target:?}" -mindepth 1 \( -type d -exec mountpoint -q {} \; -prune \) -o -delete
+    find "${target:?}" -mindepth 1 \( -type d -exec mountpoint -q {} \; -prune \) -o -print0 | xargs -0 rm -rf --
   fi
 
   if ! cp -r "$source_dir"/* "$target/"; then
@@ -9372,7 +9372,7 @@ fetch_and_deploy_from_url() {
   mkdir -p "$directory"
 
   if [[ "${CLEAN_INSTALL:-0}" == "1" ]]; then
-    find "${directory:?}" -mindepth 1 \( -type d -exec mountpoint -q {} \; -prune \) -o -delete
+    find "${directory:?}" -mindepth 1 \( -type d -exec mountpoint -q {} \; -prune \) -o -print0 | xargs -0 rm -rf --
   fi
 
   local unpack_tmp