[system-administrators-guide] Bump RevHist 1-2 for Fedora 21

[stephenw]

commit 1b75f730e08734f7bb2095eccfa1003a4af4e4fc
Author: Stephen Wadeley <swadeley at redhat.com>
Date:   Tue Dec 9 21:22:38 2014 +0100

    Bump RevHist 1-2 for Fedora 21

 en-US/Revision_History.xml |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/en-US/Revision_History.xml b/en-US/Revision_History.xml
index 70e09b8..2d980ce 100644
--- a/en-US/Revision_History.xml
+++ b/en-US/Revision_History.xml
@@ -5,6 +5,20 @@
   <title>Revision History</title>
   <simpara>
     <revhistory>
+            <revision>
+        <revnumber>1-2</revnumber>
+        <date>Tue Dec 9 2014</date>
+        <author>
+          <firstname>Stephen</firstname>
+          <surname>Wadeley</surname>
+          <email>swadeley at redhat.com</email>
+        </author>
+        <revdescription>
+          <simplelist>
+            <member>Fedora 21 release of the <citetitle>System Administrator's Guide</citetitle>.</member>
+          </simplelist>
+        </revdescription>
+      </revision>
       <revision>
         <revnumber>1-1</revnumber>
         <date>Thu Aug 9 2012</date>