app-container: introduce NewHashSHA256
app-container: introduce NewHashSHA256

Simple helper to generate a Hash type from a byte slice.

yifan-gu/spec,apcera/appc-spec,dustymabe/spec,3ofcoins/appc-spec,appc/spec,yifan-gu/spec,jonboulle/spec,tklauser/spec,squeed/spec,stufflebear/spec,dgonyeo/spec,craimbert/spec,3ofcoins/appc-spec,tklauser/spec,krnowak/appc-spec,iaguis/appc-spec,apcera/appc-spec,dustymabe/spec,appc/spec,ChengTiesheng/spec,sgotti/spec,apcera/appc-spec,endocode/appc-spec,mesosphere/spec,appc/spec,squeed/spec,endocode/appc-spec,dgonyeo/spec,mesosphere/spec,marineam/spec,stufflebear/spec,dustymabe/spec,jonboulle/spec,zenlinTechnofreak/spec,zenlinTechnofreak/spec,krnowak/appc-spec,tklauser/spec,ChengTiesheng/spec,philips/spec,alban/appc-spec,squeed/spec,endocode/appc-spec,stufflebear/spec,iaguis/appc-spec,sgotti/spec,3ofcoins/appc-spec,iaguis/appc-spec,alban/appc-spec,marineam/spec,zenlinTechnofreak/spec,yifan-gu/spec,marineam/spec,craimbert/spec,craimbert/spec,philips/spec,krnowak/appc-spec,dgonyeo/spec,jonboulle/spec,ChengTiesheng/spec,alban/appc-spec