kernel-install: use set -e

This means that we'll fail hard if something goes wrong, e.g. reading
of a config file. I think this is appropriate. If errors should be ignored,
the caller should do that on their end.

src/kernel-install/50-depmod.install

@@ -18,6 +18,8 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with systemd; If not, see <https://www.gnu.org/licenses/>.
 
+set -e
+
 COMMAND="${1:?}"
 KERNEL_VERSION="${2:?}"
 

src/kernel-install/90-loaderentry.install

@@ -18,6 +18,8 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with systemd; If not, see <https://www.gnu.org/licenses/>.
 
+set -e
+
 COMMAND="${1:?}"
 KERNEL_VERSION="${2:?}"
 ENTRY_DIR_ABS="${3:?}"

src/kernel-install/kernel-install.in

@@ -20,6 +20,8 @@
 
 skip_remaining=77
 
+set -e
+
 usage()
 {
     echo "Usage:"