Rename hash_detail::float_limits => hash_detail::limits, since it's also used

for integers in the tests.


[SVN r35559]

libs/functional

@@ -1 +1 @@
-Subproject commit c7778306f84fc4ed30a948d8e378049b4ff7268c
+Subproject commit 585813f9fe4a2d6a32c844abd218dd59d039dc8e