build-install-package: Added checks at some important points

These checks force the script to exit on error.

Signed-off-by: Erik Alexandre Pucci <eap08@c3sl.ufpr.br>
Acked-by: Danilo Kiyoshi Simizu Yorinori <danilok@c3sl.ufpr.br>
Acked-by: Tiago Rodrigo Kepe <trk08@c3sl.ufpr.br>