Fix: #4 Fix patch to use "git am".

patches/libvirt-7.5-vitastor.diff

@@ -1,8 +1,8 @@
-commit c6e1958a1b4974828e8e5852beb252ce6594e670
+From commit c6e1958a1b4974828e8e5852beb252ce6594e670
+From: Vitaliy Filippov <vitalif@yourcmc.ru>
 Author: Vitaliy Filippov <vitalif@yourcmc.ru>
-Date:   Mon Jun 28 01:20:19 2021 +0300
-
-    Add Vitastor support
+Date: Mon Jun 28 01:20:19 2021 +0300
+Subject: Add Vitastor support
 
 diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
 index 5ea14b6..a9df168 100644