libsemanage: Set new restorecon handle before doing restorecon

In semanage_setfiles(), need to reset the restorecon handle to make
sure restorecon is not operating on old selabel data.

This fixes commit d96f27b ("libsemanage: Preserve file context
and ownership in policy store") which could cause restorecon to use
old data.

Reported-by: Petr Lautrbach <lautrbach@redhat.com>
Signed-off-by: James Carter <jwcart2@gmail.com>
Acked-by: Petr Lautrbach <lautrbach@redhat.com>

libsemanage/src/semanage_store.c

@@ -3012,9 +3012,14 @@ log_callback_mute(__attribute__((unused)) int type, __attribute__((unused)) cons
 void semanage_setfiles(semanage_handle_t * sh, const char *path){
 	struct stat sb;
 	int fd;
+	struct selabel_handle *sehandle;
+
 	union selinux_callback cb_orig = selinux_get_callback(SELINUX_CB_LOG);
 	union selinux_callback cb = { .func_log = log_callback_mute };
 
+	sehandle = selinux_restorecon_default_handle();
+	selinux_restorecon_set_sehandle(sehandle);
+
 	/* Mute all logs */
 	selinux_set_callback(SELINUX_CB_LOG, cb);