stage1/enterexec: Add entry to ASSCB_EXTRA_HEADERS
stage1/enterexec: Add entry to ASSCB_EXTRA_HEADERS

Added entry to ASSCB_EXTRA_HEADERS for a better changes tracking.

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