wix: include the help for pager

Similar (I assume) to 65d2538ac993.

contrib/wix/help.wxs

@@ -25,6 +25,7 b''
           <File Name="hgignore.txt" />
           <File Name="hgweb.txt" />
           <File Name="merge-tools.txt" />
+          <File Name="pager.txt" />
           <File Name="patterns.txt" />
           <File Name="phases.txt" />
           <File Name="revisions.txt" />

tests/test-install.t

@@ -166,7 +166,6 b' path variables are expanded (~ is the sa'
     help/hg.1.txt
     help/hgignore.5.txt
     help/hgrc.5.txt
-    help/pager.txt
   Not tracked:
 
   $ python wixxml.py templates