build-sys: restore systemshutdowndir substitution

This was accidentally removed in d6b07ef.

diff --git a/Makefile.am b/Makefile.am
index 2a79a2a..1c5df68 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -5960,6 +5960,7 @@ substitutions = \
        '|systemgidmax=$(SYSTEM_GID_MAX)|' \
        '|TTY_GID=$(TTY_GID)|' \
        '|systemsleepdir=$(systemsleepdir)|' \
+       '|systemshutdowndir=$(systemshutdowndir)|' \
        '|binfmtdir=$(binfmtdir)|' \
        '|modulesloaddir=$(modulesloaddir)|'