oeqa/runner: Pass the value of buffer, don't force to True

The value could be False in which case we should pass that through.

(From OE-Core rev: d0a3379bbcbcd8153bd59ccdb56d40fff7ad6c6b)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/core/runner.py

@@ -50,7 +50,7 @@ class OETestResult(_TestResult):
         # so stdout/stderr are only printed upon failure. Enables debugging
         # but clean output
         if hasattr(test, "buffer"):
-            self.buffer = True
+            self.buffer = test.buffer
         super(OETestResult, self).startTest(test)
 
     def _tc_map_results(self):