gstcool.conf: Adjust rank realted in lpcm elements
gstcool.conf: Adjust rank realted in lpcm elements

To resolve the conflict the lpcm codec priority
between omxlpcmdec and dvdlpcmdec, adjust the rank.

Change-Id: I3c36a81e51bd3a8820804e6bbd4c00c3b02a1137
Reviewed-on: https://gpro.lgsvl.com/67932
Reviewed-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>
Tested-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>

justinjoy/gst-plugins-cool,justinjoy/gst-plugins-cool