oeqa/selftest: Standardize json logging output directory

Currently sdk & sdkext will output json file to LOG_DIR, while
selftest will output json file to TOPDIR/log.

Standardize selftest json output file to LOG_DIR.

(From OE-Core rev: 2012d6b076fc833864a0254d56d78536314a6799)

Signed-off-by: Yeoh Ee Peng <ee.peng.yeoh@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/context.py

@@ -205,7 +205,7 @@ class OESelftestTestContextExecutor(OETestContextExecutor):
         runCmd("bitbake -e")
 
     def get_json_result_dir(self, args):
-        json_result_dir = os.path.join(os.path.dirname(os.path.abspath(args.output_log)), 'log', 'oeqa')
+        json_result_dir = os.path.join(self.tc.td["LOG_DIR"], 'oeqa')
         if "OEQA_JSON_RESULT_DIR" in self.tc.td:
             json_result_dir = self.tc.td["OEQA_JSON_RESULT_DIR"]