storage.c: Fix compiler error due to missing writev() declaration
storage.c:90:7: error: implicit declaration of function ‘writev’; did you mean ‘write’? [-Werror=implicit-function-declaration]
90 | rc = writev(g_out_fd, iov, ARRAY_SIZE(iov));
| ^~~~~~
| write
diff --git a/src/storage.c b/src/storage.c
index 0a926e4..bcb50a2 100644
--- a/src/storage.c
+++ b/src/storage.c
@@ -4,6 +4,7 @@
#include <errno.h>
#include <unistd.h>
#include <sys/stat.h>
+#include <sys/uio.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/talloc.h>