Add missing generated files to the tarball (thanks maksbotan).

C# bindings were omitted entirely.  Add a Makefile.am for this
directory even though we don't build these.

Because of a missing backslash, some POD files were not being
included.

csharp/Makefile.am

@@ -0,0 +1,24 @@
+# libguestfs C# bindings
+# Copyright (C) 2010 Red Hat Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+include $(top_srcdir)/subdir-rules.mk
+
+generator_built = \
+	Libguestfs.cs
+
+EXTRA_DIST = \
+	$(generator_built)