Patch solc to support boost 1.69

Patches taken from upstream:

ethereum/solidity#4772
ethereum/solidity#5223
ethereum/solidity#5226

It also requires a change to the arguments for the unit tests, since
boost changed how the options are parsed.

Update oldNixpkgs to the latest working version.

This revision has a `flake.nix` file so it no longer needs the input
config to specify `flake = false;`.

It also prints a warning about deprecated `stdenv.lib`.

flake.nix

@@ -6,8 +6,7 @@
 
   # Old revision of nixos-unstable to get a specific version (0.4.24)
   # of the Solidity compiler, required for building azimuth-solidity.
-  inputs.oldNixpkgs.url = "nixpkgs/d688c7cd05b155e223e478b6e6bda97737d1441b";
-  inputs.oldNixpkgs.flake = false;  # The revision is so old that the repo does not contain a flake.nix
+  inputs.oldNixpkgs.url = "nixpkgs/51d9ad94384f21ecfa17bd9e0b01dfef3d416ab1";
 
   # The old revision of nixpkgs needed for solc is broken on many other systems
   inputs.systems.url = "github:nix-systems/x86_64-linux";

solc_0_4_24/default.nix

@@ -22,6 +22,7 @@ stdenv.mkDerivation {
   patches = [
     ./patches/shared-libs-install.patch
     ./patches/gcc8.patch
+    ./patches/boost169.patch
   ];
 
   postPatch = ''
@@ -44,7 +45,7 @@ stdenv.mkDerivation {
 
   doCheck = stdenv.hostPlatform.isLinux && stdenv.hostPlatform == stdenv.buildPlatform;
   checkPhase = "LD_LIBRARY_PATH=./libsolc:./libsolidity:./liblll:./libevmasm:./libdevcore:$LD_LIBRARY_PATH " +
-               "./test/soltest -p -- --no-ipc --no-smt --testpath ../test";
+               "./test/soltest --show-progress=true -- --no-ipc --no-smt --testpath ../test";
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ boost z3 ];

solc_0_4_24/patches/boost169.patch

@@ -0,0 +1,69 @@
+commit d3c3fd20796dd18b7213938bd0ce89e8aeb9d6f3
+Author: Alex Beregszaszi <[email protected]>
+Date:   Wed Aug 8 20:46:28 2018 +0100
+
+    Use dev::toString() in Assembly instead of misusing string{} for u256
+
+diff --git a/libevmasm/Assembly.cpp b/libevmasm/Assembly.cpp
+index b71bc80cb..28ae95777 100644
+--- a/libevmasm/Assembly.cpp
++++ b/libevmasm/Assembly.cpp
+@@ -264,7 +264,7 @@ Json::Value Assembly::assemblyJSON(StringMap const& _sourceCodes) const
+ 					createJsonValue("PUSH [ErrorTag]", i.location().start, i.location().end, ""));
+ 			else
+ 				collection.append(
+-					createJsonValue("PUSH [tag]", i.location().start, i.location().end, string(i.data())));
++					createJsonValue("PUSH [tag]", i.location().start, i.location().end, dev::toString(i.data())));
+ 			break;
+ 		case PushSub:
+ 			collection.append(
+@@ -290,7 +290,7 @@ Json::Value Assembly::assemblyJSON(StringMap const& _sourceCodes) const
+ 			break;
+ 		case Tag:
+ 			collection.append(
+-				createJsonValue("tag", i.location().start, i.location().end, string(i.data())));
++				createJsonValue("tag", i.location().start, i.location().end, dev::toString(i.data())));
+ 			collection.append(
+ 				createJsonValue("JUMPDEST", i.location().start, i.location().end));
+ 			break;
+
+commit 55d91d5f9cdc176c771b6038948d5dacba383e34
+Author: Bhargava Shastry <[email protected]>
+Date:   Mon Oct 15 17:14:22 2018 +0200
+
+    Bug fix: Add missing include in test/Options.h; otherwise compiler does not recognise the boost object that Options subclasses
+
+diff --git a/test/Options.h b/test/Options.h
+index 9bc698762..cbaa0dd1a 100644
+--- a/test/Options.h
++++ b/test/Options.h
+@@ -24,7 +24,7 @@
+ #include <boost/test/unit_test.hpp>
+ #include <boost/filesystem.hpp>
+ #include <boost/version.hpp>
+-
++#include <boost/core/noncopyable.hpp>
+ #include <functional>
+
+ namespace dev
+
+commit 3d4e5f30e1696bee8482058b5ec4adb51f9f1387
+Author: chriseth <[email protected]>
+Date:   Mon Oct 15 18:08:41 2018 +0200
+
+    Correct include path
+
+diff --git a/test/Options.h b/test/Options.h
+index cbaa0dd1a..0e8a51dad 100644
+--- a/test/Options.h
++++ b/test/Options.h
+@@ -24,7 +24,8 @@
+ #include <boost/test/unit_test.hpp>
+ #include <boost/filesystem.hpp>
+ #include <boost/version.hpp>
+-#include <boost/core/noncopyable.hpp>
++#include <boost/noncopyable.hpp>
++
+ #include <functional>
+
+ namespace dev