Patch to fix exception safety in boost::asio::detail::hash_map.
Related to https://svn.boost.org/trac/boost/ticket/11823

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Steps to recreate the patch:
1) Original boost sources in the directory: 
       packages\3rdParty\boost\<version>\src\original\boost_<version>\...
2) Modified sources in:
       packages\3rdParty\boost\<version>\src\patched\boost_<version>\...
3) Cygwin console, in folder: packages/3rdParty/boost/<version>/src
4) Patch generated as: 
   diff -Nru original patched > boost_asio_hash_map_exception_safety.patch
5) This note added to the patch file


diff -Nru original/boost_1_60_0/boost/asio/detail/hash_map.hpp patched/boost_1_60_0/boost/asio/detail/hash_map.hpp
--- original/boost_1_60_0/boost/asio/detail/hash_map.hpp	2015-12-13 18:23:11.000000000 -0800
+++ patched/boost_1_60_0/boost/asio/detail/hash_map.hpp	2016-05-09 15:14:59.450066200 -0700
@@ -244,15 +244,15 @@
   {
     if (num_buckets == num_buckets_)
       return;
-    num_buckets_ = num_buckets;
-    BOOST_ASIO_ASSERT(num_buckets_ != 0);
+    BOOST_ASIO_ASSERT(num_buckets != 0);
 
     iterator end_iter = values_.end();
 
     // Update number of buckets and initialise all buckets to empty.
-    bucket_type* tmp = new bucket_type[num_buckets_];
+    bucket_type* tmp = new bucket_type[num_buckets];
     delete[] buckets_;
     buckets_ = tmp;
+    num_buckets_ = num_buckets;
     for (std::size_t i = 0; i < num_buckets_; ++i)
       buckets_[i].first = buckets_[i].last = end_iter;