tree-wide: embed dlopen notes into individual executables

Previously, when a library was dynamically loaded via a helper function
inside libsystemd-shared.so, the resulting dlopen ELF note was not
propagated to the invoking executable's ELF metadata.

This commit explicitly annotates each executable with the relevant
dlopen ELF notes for any optional dependencies it might potentially
load. This ensures that package managers and build systems can properly
discover runtime dependencies that are triggered indirectly.

src/mstack/mstack-tool.c

@@ -6,6 +6,7 @@
 #include "argv-util.h"
 #include "build.h"
 #include "chase.h"
+#include "dlopen-note.h"
 #include "errno-util.h"
 #include "extract-word.h"
 #include "fd-util.h"
@@ -376,6 +377,11 @@ static int umount_mstack(void) {
 static int run(int argc, char *argv[]) {
         int r;
 
+        LIBBLKID_NOTE(recommended);
+        LIBCRYPTO_NOTE(suggested);
+        LIBCRYPTSETUP_NOTE(suggested);
+        LIBMOUNT_NOTE(recommended);
+
         log_setup();
 
         if (invoked_as(argv, "mount.mstack"))