Patch libsnark to build with my compiler. Upstream PR #35.

depends/packages/libsnark.mk

@@ -7,10 +7,11 @@ $(package)_sha256_hash=b5ec84a836d0d305407d5f39c8176bae2bb448abe802a8d11ba0f88f1
 $(package)_git_commit=69f312f149cc4bd8def8e2fed26a7941ff41251d
 
 $(package)_dependencies=libgmp
-$(package)_patches=1_fix_Wl_flag.patch
+$(package)_patches=1_fix_Wl_flag.patch 2_include_iota_header.patch
 
 define $(package)_preprocess_cmds
-    patch -p1 < $($(package)_patch_dir)/1_fix_Wl_flag.patch
+    patch -p1 < $($(package)_patch_dir)/1_fix_Wl_flag.patch && \
+    patch -p1 < $($(package)_patch_dir)/2_include_iota_header.patch
 endef
 
 define $(package)_build_cmds

depends/patches/libsnark/2_include_iota_header.patch

@@ -0,0 +1,31 @@
+commit c437365ec98ec77754287594d2d3748901d0d176
+Author: Taylor Hornby <taylor@defuse.ca>
+Date:   Wed May 18 10:49:58 2016 -0600
+
+    Include header required for std::iota.
+
+diff --git a/src/common/data_structures/integer_permutation.cpp b/src/common/data_structures/integer_permutation.cpp
+index f9f9327..378ea7e 100644
+--- a/src/common/data_structures/integer_permutation.cpp
++++ b/src/common/data_structures/integer_permutation.cpp
+@@ -15,6 +15,7 @@
+ 
+ #include <algorithm>
+ #include <cassert>
++#include <numeric>
+ #include <unordered_set>
+ 
+ namespace libsnark {
+diff --git a/src/common/data_structures/sparse_vector.tcc b/src/common/data_structures/sparse_vector.tcc
+index 26429a5..cfc5d75 100644
+--- a/src/common/data_structures/sparse_vector.tcc
++++ b/src/common/data_structures/sparse_vector.tcc
+@@ -16,6 +16,8 @@
+ 
+ #include "algebra/scalar_multiplication/multiexp.hpp"
+ 
++#include <numeric>
++
+ namespace libsnark {
+ 
+ template<typename T>