build: Make ip.manifest consistent with other files
build: Make ip.manifest consistent with other files

All other manifest files do not add the root slash to the path. Also
fixes the missing files detection for kvm flavor.

ybubnov/rkt,lucasallan/rkt,tmrts/rkt,dgonyeo/rkt,squeed/rkt,nhlfr/rkt,monstermunchkin/rkt,joshix/rkt,squeed/rkt,cab105/rkt,sstabellini/rkt,s-urbaniak/rkt,yifan-gu/rkt,shobhit85/rkt,joshix/rkt,kinvolk/rkt,dgonyeo/rkt,kinvolk/rkt,lucasallan/rkt,Shashwatsh/rkt,akshaykarle/rkt,coreos/rkt,nhlfr/rkt,jonboulle/rkt,lucasallan/rkt,mike1729/rkt,matthaias/rkt,sstabellini/rkt,cab105/rkt,rkt/rkt,euank/rkt,monstermunchkin/rkt,markllama/rkt,tmrts/rkt,alban/rkt,akshaykarle/rkt,jakon89/rkt,mike1729/rkt,yifan-gu/rocket,Wilybald/rkt,sstabellini/rkt,matthaias/rkt,Shashwatsh/rkt,Wilybald/rkt,sgotti/rkt,kinvolk/rkt,coreos/rkt,jakon89/rkt,ybubnov/rkt,jakon89/rkt,coreos/rkt,achanda/rkt,jjlakis/rkt,jjlakis/rkt,euank/rkt,jonboulle/rkt,achanda/rkt,yifan-gu/rocket,matthaias/rkt,rkt/rkt,mike1729/rkt,kinvolk/rkt,lucasallan/rkt,sgotti/rkt,jjlakis/rkt,euank/rkt,s-urbaniak/rkt,shobhit85/rkt,intelsdi-x/rkt,rkt/rkt,shobhit85/rkt,alban/rkt,cab105/rkt,s-urbaniak/rkt,squeed/rkt,akshaykarle/rkt,markllama/rkt,Wilybald/rkt,alban/rkt,ybubnov/rkt,joshix/rkt,Shashwatsh/rkt,monstermunchkin/rkt,intelsdi-x/rkt,joshix/rkt,tmrts/rkt,sgotti/rkt,yifan-gu/rocket,jonboulle/rkt,yifan-gu/rkt,markllama/rkt,yifan-gu/rkt,Wilybald/rkt,intelsdi-x/rkt,nhlfr/rkt,achanda/rkt,dgonyeo/rkt,rkt/rkt