python3.x: Patch extra stack size on darwin

Compiling python with "-Wl,-stack_size,1000000" causes problems when
compiling for example pygobject3. pygobject3 uses "python3.x-config
--ldflags" during installation and then fails when
"-Wl,-stack_size,1000000" is present. Maybe we should investigate
removing this during the build of pyobject3, but this stack_size flag is
also not used on the popular darwin homebrew-core channel for python3.5,
so it seems safe to remove it.

pkgs/development/interpreters/python/cpython/3.4/default.nix

@@ -60,6 +60,7 @@ stdenv.mkDerivation {
 
   prePatch = optionalString stdenv.isDarwin ''
     substituteInPlace configure --replace '`/usr/bin/arch`' '"i386"'
+    substituteInPlace configure --replace '-Wl,-stack_size,1000000' ' '
   '';
 
   preConfigure = ''

pkgs/development/interpreters/python/cpython/3.5/default.nix

@@ -57,6 +57,7 @@ stdenv.mkDerivation {
 
   prePatch = optionalString stdenv.isDarwin ''
     substituteInPlace configure --replace '`/usr/bin/arch`' '"i386"'
+    substituteInPlace configure --replace '-Wl,-stack_size,1000000' ' '
   '';
 
   preConfigure = ''

pkgs/development/interpreters/python/cpython/3.6/default.nix

@@ -61,6 +61,7 @@ stdenv.mkDerivation {
 
   prePatch = optionalString stdenv.isDarwin ''
     substituteInPlace configure --replace '`/usr/bin/arch`' '"i386"'
+    substituteInPlace configure --replace '-Wl,-stack_size,1000000' ' '
   '';
 
   preConfigure = ''