boost: Package Version Update -> 1.67.0

This package update provides two new libraries
- Contract (compiled library) [1]: Contract programming for C++.
  All contract programming features are supported: Subcontracting,
  class invariants, postconditions (with old and return values),
  preconditions, customizable actions on assertion failure (e.g.,
  terminate or throw), optional compilation and checking of
  assertions, etc, from Lorenzo Caminiti.

- HOF (header-only library) [2]:
  Higher-order functions for C++, from Paul Fultz II.

More info can be found at the usual place [3].

[1]: https://www.boost.org/libs/contract
[2]: https://www.boost.org/libs/hof
[3]: https://www.boost.org/users/history/version_1_67_0.html

Signed-off-by: Carlos Miguel Ferreira <carlosmf.pt@gmail.com>

libs/boost/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2015-2017 OpenWrt.org
+# Copyright (C) 2015-2018 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -16,15 +16,15 @@ include $(INCLUDE_DIR)/nls.mk
 include $(INCLUDE_DIR)/target.mk 
 
 PKG_NAME:=boost
-PKG_VERSION:=1.66.0
-PKG_SOURCE_VERSION:=1_66_0
+PKG_VERSION:=1.67.0
+PKG_SOURCE_VERSION:=1_67_0
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)_$(PKG_SOURCE_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://sourceforge.net/projects/boost/files/boost/$(PKG_VERSION)
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)_$(PKG_SOURCE_VERSION)
 HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/$(PKG_NAME)_$(PKG_SOURCE_VERSION)
-PKG_HASH:=5721818253e6a0989583192f96782c4a98eb6204965316df9f5ad75819225ca9
+PKG_HASH:=2684c972994ee57fc5632e03bf044746f6eb45d4920c343937a465fd67a5adba
 PKG_LICENSE:=Boost Software License <http://www.boost.org/users/license.html>
 PKG_MAINTAINER:=Carlos M. Ferreira <carlosmf.pt@gmail.com>
 
@@ -44,7 +44,7 @@ define Package/boost/Default
 endef
 
 define Package/boost/description
-This package provides the Boost v1.66.0 libraries.
+This package provides the Boost v1.67.0 libraries.
 Boost is a set of free, peer-reviewed, portable C++ source libraries.
 
 -----------------------------------------------------------------------------
@@ -90,7 +90,7 @@ This package provides the following run-time libraries:
  - wave
 
 There are many more header-only libraries supported by Boost.
-See more at http://www.boost.org/doc/libs/1_66_0/
+See more at http://www.boost.org/doc/libs/1_67_0/
 endef
 
 PKG_BUILD_DEPENDS:=boost/host PACKAGE_python:python PACKAGE_python3:python3
@@ -301,6 +301,7 @@ $(eval $(call DefineBoostLibrary,atomic,system,))
 $(eval $(call DefineBoostLibrary,chrono,system,))
 $(eval $(call DefineBoostLibrary,container,,))
 $(eval $(call DefineBoostLibrary,context,chrono system thread,))
+$(eval $(call DefineBoostLibrary,contract,system,))
 $(eval $(call DefineBoostLibrary,coroutine,system chrono context thread,))
 $(eval $(call DefineBoostLibrary,date_time,,))
 #$(eval $(call DefineBoostLibrary,exception,,))