kunit: capture stderr on all make subprocess calls

BugLink: https://bugs.launchpad.net/bugs/1892215

[ Upstream commit 5a9fcad ]

Direct stderr to subprocess.STDOUT so error messages get included in the
subprocess.CalledProcessError exceptions output field. This results in
more meaningful error messages for the user.

This is already being done in the make_allyesconfig method. Do the same
for make_mrproper, make_olddefconfig, and make methods.

With this, failures on unclean trees [1] will give users an error
message that includes:
"The source tree is not clean, please run 'make ARCH=um mrproper'"

[1] https://bugzilla.kernel.org/show_bug.cgi?id=205219

Signed-off-by: Will Chen <chenwi@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>

Author: Will Chen

tools/testing/kunit/kunit_kernel.py

@@ -34,7 +34,7 @@ class LinuxSourceTreeOperations(object):
 
 	def make_mrproper(self):
 		try:
-			subprocess.check_output(['make', 'mrproper'])
+			subprocess.check_output(['make', 'mrproper'], stderr=subprocess.STDOUT)
 		except OSError as e:
 			raise ConfigError('Could not call make command: ' + e)
 		except subprocess.CalledProcessError as e:
@@ -47,7 +47,7 @@ def make_olddefconfig(self, build_dir, make_options):
 		if build_dir:
 			command += ['O=' + build_dir]
 		try:
-			subprocess.check_output(command, stderr=subprocess.PIPE)
+			subprocess.check_output(command, stderr=subprocess.STDOUT)
 		except OSError as e:
 			raise ConfigError('Could not call make command: ' + e)
 		except subprocess.CalledProcessError as e:
@@ -77,7 +77,7 @@ def make(self, jobs, build_dir, make_options):
 		if build_dir:
 			command += ['O=' + build_dir]
 		try:
-			subprocess.check_output(command)
+			subprocess.check_output(command, stderr=subprocess.STDOUT)
 		except OSError as e:
 			raise BuildError('Could not call execute make: ' + e)
 		except subprocess.CalledProcessError as e: