package/libostree: select libarchive for s390x architecture

libarchive is needed when building for s390x.

Introduced in this patch:
c6a53ef6e8f9491633b0d494991f94c629791e1d s390x: use 'libarchive' to modify initrd in SE case

Fixes:

  http://autobuild.buildroot.net/results/14cc164ab3005be9b3efde57b4bd914414e3acf0/

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libostree/Config.in

@@ -7,6 +7,7 @@ config BR2_PACKAGE_LIBOSTREE
 	# doesn't build with musl due to lack of TEMP_FAILURE_RETRY()
 	depends on !BR2_TOOLCHAIN_USES_MUSL
 	select BR2_PACKAGE_E2FSPROGS
+	select BR2_PACKAGE_LIBARCHIVE if BR2_s390x
 	select BR2_PACKAGE_LIBGLIB2
 	select BR2_PACKAGE_LIBGPG_ERROR
 	select BR2_PACKAGE_LIBGPGME