UBUNTU: [Packaging] autopkgtest -- disable d-i when dropping flavours

BugLink: http://bugs.launchpad.net/bugs/1764794
OldBugLink: http://bugs.launchpad.net/bugs/1717920Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

debian/rules

@@ -95,6 +95,7 @@ do_any_tools=$(sort $(filter-out false,$(do_linux_tools) $(do_cloud_tools)))
 #  only build the first flavour on the assumption it is representative
 ifneq ($(filter autopkgtest,$(DEB_BUILD_PROFILES)),)
 flavours := $(firstword $(flavours))
+disable_d_i=true
 endif
 
 # Debian Build System targets