[yocto] Yocto weekly bug trend charts -- WW26

[Xu, Jiajun]

Hi all,
	From this week, a new chart is introduced -- Open bug Trend by Severity. This chart shows latest open bug number by severity and does not take Enhancement bug into account. We will use the number from now instead of total open bug number in bugzilla. The number of last week is 174. And the weight number increased to 898. Bug status of WW26 could be found on https://wiki.pokylinux.org/wiki/Yocto_Bug_Trend.

Best Regards,
Jiajun