Add boost license info to documentation for a few libraries.

  * Boost.Any: Kevlin Henney is in blanket-permission.txt
  * Boost.Variant: Eric Friedman and Itay Maman are both in blanket-permissions.txt
  * Boost.Concept: Idiana University, University of Notre Dame du Lac, Jeremy Siek,
    Lie-Quan Lee, Andrew Lumsdaine are all listed under blanket permissions.

  SGI and HP aren't so their license is left alone.

[SVN r55098]

libs/any

@@ -1 +1 @@
-Subproject commit 96443e1f00d4517746b31ac4b304562b2249d0bb
+Subproject commit f462b543de51f4e0af9aabf8b2a092abd959df1e

libs/concept_check

@@ -1 +1 @@
-Subproject commit e234ae22f601da793d06cee7b60da308a71b4ac3
+Subproject commit 9ceeae9e9fb0e7e8beda58c63fab6cb238d54dfd

libs/variant

@@ -1 +1 @@
-Subproject commit 5d727edcff19fac9a92668fc8dd2b622b79dcbac
+Subproject commit 25da2b8de7ce0641e272eb19646a033cdbf5922b