fix version of systemd book

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11652 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

general-orig.ent

@@ -3,7 +3,7 @@
                                       Change to x.y for release but not -rc releases -->
 <!ENTITY generic-version "development"> <!-- Use "development"  or "x.y[-pre{x}]" -->
 
-<!ENTITY versiond        "20190803-systemd">
+<!ENTITY versiond        "20190804-systemd">
 <!ENTITY short-versiond  "systemd">
 <!ENTITY generic-versiond "systemd">