stage1hash.go: Fix the documentation for getStage1Hash().
stage1hash.go: Fix the documentation for getStage1Hash().

Make comments consistent to the implementation as currently
the 'location' field only supports URL and file path.

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