syscontainers: ensure destdir exists

Closes: projectatomic#1138

Closes: projectatomic#1140
Approved by: miabbott

Atomic/syscontainers.py

@@ -688,17 +688,20 @@ def _is_repo_on_the_same_filesystem(repo, destdir):
         :type destdir: str
         """
         repo_stat = os.stat(repo)
-        destdir_stat = os.stat(destdir)
+        try:
+            destdir_stat = os.stat(destdir)
+        except OSError as e:
+            if e.errno == errno.ENOENT:
+                # The directory doesn't exist
+                os.makedirs(destdir)
+                destdir_stat = os.stat(destdir)
+            else:
+                raise e
+
         # Simple case: st_dev is different
         if repo_stat.st_dev != destdir_stat.st_dev:
             return False
 
-        try:
-            os.makedirs(destdir)
-        except OSError as e:
-            if e.errno != errno.EEXIST:
-                raise
-
         src_file = os.path.join(repo, "config")
         dest_file = os.path.join(destdir, "samefs-check-{}".format(os.getpid()))
         # Try to create a link, check if it fails with EXDEV