support/script/scancpan: fix corelist check

module could be removed of the core,
so check if the module is currently in the core,
but not if the module was once time included in the core.

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
user guest
perl: skip some tests which need the toolchain
perl: fix test IO-Socket-IP
perl: check date in harness
qemu: add a Config.in.host

after the removal of cpanminus
perl: build with host-qemu
pkg-perl: with qemu
perl: bump version to 5.21.6