gst-shark logging bug

[dwmarcuskim]

Bug found in native gst-shark code, first issued by @Spiraline

Error generating script

$ GST_DEBUG="GST_TRACER:7" \
    GST_TRACERS="live;cpuusage;queuelevel" \
    ./nnstreamer_example_object_detection_tflite

Expected result

datastream and metadata recorded in ./gstshark_${time}

Actual result

metadata file wasn't written. (0 bytes)

Other experiments

$ GST_DEBUG="GST_TRACER:7" \
    GST_TRACERS="live;cpuusage;queuelevel" \
    ./gst-launch-object-detection-tflite.sh

• metadata and datastream written correctly.
• Bug seems to be happened only when pipeline generated from binary file. (OK with gst-launch script)