util-lib: split out allocation calls into alloc-util.[ch]

src/cryptsetup/cryptsetup-generator.c

@@ -21,6 +21,7 @@
 
 #include <errno.h>
 
+#include "alloc-util.h"
 #include "dropin.h"
 #include "fd-util.h"
 #include "fileio.h"

src/cryptsetup/cryptsetup.c

@@ -27,6 +27,7 @@
 
 #include "sd-device.h"
 
+#include "alloc-util.h"
 #include "ask-password-api.h"
 #include "device-util.h"
 #include "escape.h"