Fail on missing programs, instead of generating bogus scripts

(cherry picked from commit 0b5fba46aba7b35c8c3bcb80de43dec0ba8e97da)
Explicitly give the right build dependency for insmod/rmmod/etc

(cherry picked from commit 39e36ebd8fa5530ba87e162c17bac2c5ce57621f)

Conflicts:

	debian/configure
	debian/control.in