Update version to 1.2.1-rc2

Author: msimberg

hpx/config/version.hpp

@@ -32,13 +32,13 @@
 #define HPX_VERSION_MINOR        2
 #define HPX_VERSION_SUBMINOR     1
 
-#define HPX_VERSION_DATE         20190201
+#define HPX_VERSION_DATE         20190206
 
 #if !defined(HPX_AGAS_VERSION)
     #define HPX_AGAS_VERSION 0x30
 #endif
 
-#define HPX_VERSION_TAG          "-rc1"
+#define HPX_VERSION_TAG          "-rc2"
 
 #if !defined(HPX_HAVE_GIT_COMMIT)
     #define HPX_HAVE_GIT_COMMIT  "unknown"