Running 'make' builds the file src/efibootmgr/efibootmgr.
efibootmgr should be placed into /usr/sbin/.

efibootmgr currently requires efivar version 0.19, as well as the pkg-config
utility, to be built.

efivar: https://github.com/rhinstaller/efivar
pkg-config: http://pkgconfig.freedesktop.org

