flatbuffers/grpc/build_grpc_with_cxx14.patch

diff --git a/bazel/copts.bzl b/bazel/copts.bzl
index 10be944f25..879518b92f 100644
--- a/bazel/copts.bzl
+++ b/bazel/copts.bzl
@@ -59,4 +59,7 @@ GRPC_LLVM_WARNING_FLAGS = [
 GRPC_DEFAULT_COPTS = select({
     "//:use_strict_warning": GRPC_LLVM_WARNING_FLAGS + ["-DUSE_STRICT_WARNING=1"],
     "//conditions:default": [],
-})
+}) + select({
+        "@bazel_tools//src/conditions:windows": ["/std:c++14"],
+        "//conditions:default": ["-std=c++14"],
+})