Avoid to crash on unicode decoding errors

As kobo.shortcuts.run can't handle binary output correctly, it causes
pungi-make-ostree crashed when rpm-ostree outputs unexpected characters.

JIRA: RHELCMP-14253
Fixes: https://pagure.io/releng/issue/12474
Signed-off-by: Haibo Lin <hlin@redhat.com>

pungi/ostree/tree.py

@@ -16,6 +16,7 @@
 
 import os
 import json
+import subprocess
 from kobo import shortcuts
 
 from pungi.util import makedirs
@@ -59,13 +60,19 @@ class Tree(OSTree):
         # permissions. See https://pagure.io/releng/issue/8811#comment-629051
         oldumask = os.umask(0o0002)
         try:
-            shortcuts.run(
-                cmd,
-                show_cmd=True,
-                stdout=True,
-                logfile=log_file,
-                universal_newlines=True,
-            )
+            with open(log_file, "w") as f:
+                f.write(f"COMMAND: {' '.join(cmd)}\n")
+                f.flush()
+                proc = subprocess.Popen(
+                    cmd,
+                    shell=True,
+                    stdout=f,
+                    stderr=subprocess.STDOUT,
+                    universal_newlines=True,
+                )
+                ret_code = proc.wait()
+            if ret_code:
+                raise RuntimeError(f"Failed to run rpm-ostree, log_file: {log_file}")
         finally:
             os.umask(oldumask)