scripts: add libtspi-dev
scripts: add libtspi-dev

Now the install script can be reused e.g. for the 'build with docker' part

Fixes #2215

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