UMM feature suggestion

Hi,

I got a suggestion (from a ST-E colleague) to help debug with futur UMM. The idea is to add a "comment" to each allocated buffer and with cat /proc/umm you get a list of all the allocated buffers + the associated comment. The comment is only a string and you can put what you want it. For example you can just put the line of the file where the allocation is done or something like "h264 1080p frame".

I think it could be very useful for debug if we could add this.

Benjamin