kunit: tool: fixed issue introduced by improve error messages for invalid kconfigs

1996e6ba3efce20a6a64c527024acbd484db2f9d ("kunit: test: improve error
messages for invalid kconfigs",
https://kunit.googlesource.com/linux/+/1996e6ba3efce20a6a64c527024acbd484db2f9d)
broke kunit_tool when trying to build a kernel with an invalid config.

Google-Bug-Id: 129365734
Change-Id: Ib23456a0a976b5da6d00586db7d6b534a3adbe78
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
1 file changed