Fix: Decode run_cmd() result

Since commit 02697af5, ExecContext.run() returns bytes for stdout and stderr and fixes that in calling code. The thing it did not fix was the code calling run_cmd(), which also made return bytes. This commit catches up on that.
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/cmds/projects/CmdBuild.py

@@ -4,7 +4,7 @@ import os, re, sys, subprocess, datetime, time
 from argparse import Namespace, ArgumentParser
 from functools import lru_cache
 
-from ...lib.util import run_cmd, get_profile_env
+from ...lib.util import get_profile_env
 from ...lib.log import *
 from ..Cmd import Cmd
 from ..CmdProjects import CmdProjects
@@ -115,7 +115,7 @@ class CmdBuild(Cmd): # export
                 env = await get_profile_env(keep=keep)
 
             try:
-                stdout, stderr, status  = await run_cmd(
+                await self.app.exec_context.run(
                     make_cmd,
                     wd=wd,
                     throw=True,