meson: declare version.h as dependency for systemd

This is a followup to #11815 and adds the last missing dependency.
With this #11565 is hopefully really fixed.

meson.build

@@ -1616,7 +1616,8 @@ executable('systemd',
            include_directories : includes,
            link_with : [libcore,
                         libshared],
-           dependencies : [threads,
+           dependencies : [versiondep,
+                           threads,
                            librt,
                            libseccomp,
                            libselinux,