Bug#1145879: freecad: Don't use a full package build as superficial autopkgtest

[Adrian Bunk]

Source: freecad
Version: 1.1.3+dfsg-1
Severity: serious

An autopkgtest is supposed to test whether the version of your
package in the archive still works, testing whether your package
still builds is done elsewhere - and the autopkgtest infrastructure
is not designed to handle builds of large packages like freecad.