Windows: Build the pe_image target as C++17 (see issue #2819)

This works around a bug in the Visual C++ standard library where the
std::is_integral templates are exported instead of inlined when building
with C++14. See also https://bugs.llvm.org/show_bug.cgi?id=42027.

patch/patches/win_cpp17_msvc_sandbox_2819.patch

@@ -0,0 +1,28 @@
+diff --git base/third_party/double_conversion/BUILD.gn base/third_party/double_conversion/BUILD.gn
+index 0083efdcd9c8..6f647c31e28a 100644
+--- base/third_party/double_conversion/BUILD.gn
++++ base/third_party/double_conversion/BUILD.gn
+@@ -9,6 +9,11 @@ config("config") {
+     "-Wno-unused-const-variable",
+     "-Wno-unused-function",
+   ]
++
++  # Build as C++17 to avoid export of templates that should be inlined.
++  if (is_win) {
++    cflags_cc = [ "/std:c++17" ]
++  }
+ }
+ 
+ static_library("double_conversion") {
+diff --git base/win/BUILD.gn base/win/BUILD.gn
+index 33a38267a658..0d54f224d31c 100644
+--- base/win/BUILD.gn
++++ base/win/BUILD.gn
+@@ -31,4 +31,7 @@ static_library("pe_image") {
+     "pe_image.cc",
+     "pe_image.h",
+   ]
++
++  # Build as C++17 to avoid export of templates that should be inlined.
++  cflags_cc = [ "/std:c++17" ]
+ }