overlay: remove Trebuchet overlays

Change-Id: Id4a0332ce419bdaa1ee2431dc4ced9a12281e078
update tcp buffersize

Change-Id: If4079dab869d3567e432eaad14b33855dfd44688
Change tether regexs

Change-Id: Ib3aa9698afd55fc255fac595e3ff58d2b060e563
remove qrngd

Change-Id: Ie3151f61d793fd9e35f714e78cfbcf8b673b3430
Merge branch 'cm/cm-11.0'