scripts/runqemu: add ext4 to the list of extracted extensions

Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
runqemu-internal: support for ext2 and ext4 not only ext3

Don't check only for ext3 fstype, we can boot ext2 and ext4 just
as well.

Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
imagetest-qemu.bbclass, qemuimage-testlib: add support for more FSTYPES

qemuimage-testlib hardcodes ext3 as fs type. This adds support for more
images types which are supported by runqemu: ext[234]/jffs2/btrfs.

I've skipped (for now) vmdk (which qemu can boot) because:
 - we don't have network on images without connman because of the way
runqemu starts vmdk images (can't pass kernel args for network config)
 - qemuimage-testlib-pythonhelper relies on '192.168' being in the output of
ps to return the pid

Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
tcp-wrappers: Rename conflicting variable STRINGS in Makefile

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
tcp-wrappers: fix indentation

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
bitbake.conf: export STRINGS

* remove STRINGS export from systemd

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>