user: Consider symbolic links as possible directories

Commit 2296f194 reduced the number
of syscalls performed during user emulation startup, but failed to
consider the use of symbolic links in creating directory structures.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

path.c

@@ -58,9 +58,10 @@ static struct pathelem *new_entry(const char *root,
 #define streq(a,b) (strcmp((a), (b)) == 0)
 
 /* Not all systems provide this feature */
-#if defined(DT_DIR) && defined(DT_UNKNOWN)
+#if defined(DT_DIR) && defined(DT_UNKNOWN) && defined(DT_LNK)
 # define dirent_type(dirent) ((dirent)->d_type)
-# define is_dir_maybe(type)  ((type) == DT_DIR || (type) == DT_UNKNOWN)
+# define is_dir_maybe(type) \
+    ((type) == DT_DIR || (type) == DT_UNKNOWN || (type) == DT_LNK)
 #else
 # define dirent_type(dirent) (1)
 # define is_dir_maybe(type)  (type)