[Bug 208270] www/node: Fix build with libc++ 3.8.0

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208270

--- Comment #2 from commit-hook at freebsd.org ---
A commit references this bug:

Author: dim
Date: Sat Apr  2 15:51:19 UTC 2016
New revision: 412412
URL: https://svnweb.freebsd.org/changeset/ports/412412

Log:
  During the exp-run in bug 208158, it was found that www/node gives
  errors with libc++ 3.8.0 [1]:

  /usr/include/c++/v1/map:837:5: error: static_assert failed
"Allocator::value_type must be same type as value_type"
      static_assert((is_same<typename allocator_type::value_type,
value_type>::value),
      ^            
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  ../deps/v8/src/compiler/js-type-feedback.h:41:21: note: in instantiation of
template class 'std::__1::map<unsigned int, v8::internal::TypeFeedbackId,
std::__1::less<unsigned int>,
v8::internal::zone_allocator<v8::internal::TypeFeedbackId> >' requested here
    TypeFeedbackIdMap type_feedback_id_map_;
                      ^

  This is because libc++ 3.8.0 has added these sanity checks for custom
  std::map allocators, which *must* be of the type std::pair<const Key,
  Value>.  I fixed the few std::map instances in the node source by adding
  this to their allocator types.

  Approved by:  linpct at gmail.com (maintainer)
  PR:           208270
  MFH:          2016Q2

Changes:
  head/www/node/files/patch-deps_v8_src_compiler_instruction.h
  head/www/node/files/patch-deps_v8_src_compiler_js-type-feedback.h
  head/www/node/files/patch-deps_v8_src_zone-containers.h

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