UBUNTU: [Packaging] disable zfs module checks when cross-compiling

When we cross-compile we have to turn off the inbuilt zfs modules.
When doing this we also need to allow the modules so produced to go
missing in this build while still checking the remainder of the modules.

BugLink: http://bugs.launchpad.net/bugs/1581127Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

debian/rules

@@ -42,6 +42,7 @@ ifneq ($(DEB_HOST_ARCH),$(DEB_BUILD_ARCH))
 	do_tools=false
 	disable_d_i=true
 	do_zfs=false
+	do_zfs_disable:=$(shell cat $(DROOT)/zfs-modules.ignore >>$(prev_abidir)/../modules.ignore)
 endif
 
 # Stages -- support both DEB_STAGE=stage1 and DEB_BUILD_PROFILE=bootstrap

debian/zfs-modules.ignore

+spl
+splat
+zavl
+zcommon
+zfs
+znvpair
+zpios
+zunicode