Start of 1.11 version. Add missing (c) for riscv.h

include/boost/predef/architecture/riscv.h

@@ -1,4 +1,5 @@
 /*
+Copyright Andreas Schwab 2019
 Distributed under the Boost Software License, Version 1.0.
 (See accompanying file LICENSE_1_0.txt or copy at
 http://www.boost.org/LICENSE_1_0.txt)

include/boost/predef/version.h

@@ -10,6 +10,6 @@ http://www.boost.org/LICENSE_1_0.txt)
 
 #include <boost/predef/version_number.h>
 
-#define BOOST_PREDEF_VERSION BOOST_VERSION_NUMBER(1,10,0)
+#define BOOST_PREDEF_VERSION BOOST_VERSION_NUMBER(1,11,0)
 
 #endif