Boost Makefile Update to Version 1.59

This commit updates Boost to version 1.59, released in the 13th of August of 2015 [1].
  - The new version adds two new template libraries, Convert [2] and CoRoutine2 [3].
  - [Warning]-> CoRoutine2 library absolutly requires a C++14 compiler.
  - patch 001-mips-options-fix.patch was removed, since it is already incorporated upstream.

[1] - http://www.boost.org/users/history/version_1_59_0.html
[2] - http://www.boost.org/libs/convert/
[3] - http://www.boost.org/libs/coroutine2/

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

libs/boost/patches/001-mips-options-fix.patch

@@ -1,11 +0,0 @@
---- boost_1_58_0/tools/build/src/tools/gcc.jam 2015-04-23 12:01:37.723438995 +0200
-+++ boost_1_58_0/tools/build/src/tools/gcc.jam 2015-04-23 12:00:21.427441384 +0200
-@@ -451,7 +451,7 @@
-         else
-         {
-             local arch = [ feature.get-values architecture : $(properties) ] ;
--            if $(arch) != arm
-+            if $(arch) = power || $(arch) = sparc || $(arch) = x86
-             {
-                 if $(model) = 32
-                 {