treewide: for substituteAll: s/version/version_/

This is because it gets passed to mkDerivation through some route, this ensures
that doesn't mess with anything

pkgs/development/python-modules/py3exiv2/default.nix

@@ -19,7 +19,7 @@ buildPythonPackage rec {
   patches = [
     (substituteAll {
       src = ./setup.patch;
-      version = "3${stdenv.lib.versions.minor python.version}";
+      version_ = "3${stdenv.lib.versions.minor python.version}";
     })
   ];
 

pkgs/development/python-modules/py3exiv2/setup.patch

@@ -3,9 +3,9 @@
 @@ -39,7 +39,7 @@
                  if '3' in l[2:]:
                      return l.replace('libboost', 'boost')
- 
+
 -libboost = get_libboost_name()
-+libboost = 'boost_python@version@'
- 
++libboost = 'boost_python@version_@'
+
  setup(
      name='py3exiv2',