add adopters js

Created by: flora8984461

to support https://github.com/EclipseFdn/hugo-solstice-theme/pull/190

I replace the original eclipsefdn.adopters.js with https://github.com/EclipseFdn/eclipsefdn-project-adopters/blob/master/js/eclipsefdn.adopters.js

Signed-off-by: Yi Liu yi.liu@eclipse-foundation.org