Skip over "." when creating directories

This is causing issues with busybox.

Signed-off-by: Jon Johnson <[email protected]>

pkg/apk/fs/memfs.go

@@ -168,7 +168,7 @@ func (m *memFS) MkdirAll(path string, perm fs.FileMode) error {
 	traversed := make([]string, 0)
 	anode := m.tree
 	for _, part := range parts {
-		if part == "" {
+		if part == "" || part == "." {
 			continue
 		}
 		if anode.children == nil {

pkg/build/busybox.go

@@ -107,7 +107,12 @@ func installBusyboxLinks(fsys apkfs.FullFS, installed []*apk.InstalledPackage) e
 		if link == busybox || link == "" {
 			continue
 		}
+
 		dir := filepath.Dir(link)
+		if dir == "." {
+			continue
+		}
+
 		if err := fsys.MkdirAll(dir, 0755); err != nil {
 			return fmt.Errorf("creating directory %s: %w", dir, err)
 		}