Add crypto/wincrypt_shim.h wrapper header to resolve BoringSSL conflicts.

net/test/spawned_test_server/local_test_server_win.cc

Index: net/test/spawned_test_server/local_test_server_win.cc
diff --git a/net/test/spawned_test_server/local_test_server_win.cc b/net/test/spawned_test_server/local_test_server_win.cc
index 1454e85fff221690940caad3f30b4de8af694908..401cfacb0a0706c0ed8dcc912114becaae9b60b8 100644
--- a/net/test/spawned_test_server/local_test_server_win.cc
+++ b/net/test/spawned_test_server/local_test_server_win.cc
@@ -5,7 +5,6 @@
 #include "net/test/spawned_test_server/local_test_server.h"
 
 #include <windows.h>
-#include <wincrypt.h>
 
 #include "base/base_paths.h"
 #include "base/bind.h"
@@ -23,8 +22,6 @@
 #include "base/win/scoped_handle.h"
 #include "net/test/python_utils.h"
 
-#pragma comment(lib, "crypt32.lib")
-
 namespace {
 
 // Writes |size| bytes to |handle| and sets |*unblocked| to true.