UBUNTU: [Config] Add CONFIG_EXPOLINE=y and CONFIG_EXPOLINE_AUTO=y

BugLink: http://bugs.launchpad.net/bugs/1768474

Upstream commits
6e179d64 ("s390: add automatic detection of the spectre defense") and
f19fbd5e ("s390: introduce execute-trampolines for branches")
added new EXPOLINE config options, so add them to the config files.
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

debian.master/config/config.common.ubuntu

@@ -2361,6 +2361,10 @@ CONFIG_EVM_ATTR_FSUUID=y
 CONFIG_EVM_EXTRA_SMACK_XATTRS=y
 # CONFIG_EXOFS_DEBUG is not set
 CONFIG_EXPERT=y
+CONFIG_EXPOLINE=y
+CONFIG_EXPOLINE_AUTO=y
+# CONFIG_EXPOLINE_FULL is not set
+# CONFIG_EXPOLINE_OFF is not set
 CONFIG_EXPORTFS=y
 # CONFIG_EXT2_FS is not set
 # CONFIG_EXT3_FS is not set