Bump alpha channel to new image
Bump alpha channel to new image

Contains 4.4.115 built with gcc 7.3.  Should address spectre variant 2,
using the repoline approach.

Meltdown was previously addressed with KPTI.

Spectre variant 1 remains unaddressed.

kubernetes/kops,tsupertramp/kops,aledbf/kops,andrewsykim/kops,chrislovecnm/kops,robinpercy/kops,blakebarnett/kops,blakebarnett/kops,gambol99/kops,mad01/kops,blakebarnett/kops,blakebarnett/kops,gambol99/kops,andrewsykim/kops,chrislovecnm/kops,aledbf/kops,tsupertramp/kops,tsupertramp/kops,mad01/kops,kubernetes/kops,andrewsykim/kops,justinsb/kops,kubernetes/kops,chrislovecnm/kops,robinpercy/kops,aledbf/kops,gambol99/kops,andrewsykim/kops,tsupertramp/kops,chrislovecnm/kops,aledbf/kops,gambol99/kops,robinpercy/kops,mad01/kops,robinpercy/kops,justinsb/kops,mad01/kops,justinsb/kops