add one more flag

patches/0003-windows-rust-flags.patch

@@ -2,7 +2,7 @@ diff --git a/.cargo/config.toml b/.cargo/config.toml
 index 7db936b..17a3deb 100644
 --- a/.cargo/config.toml
 +++ b/.cargo/config.toml
-@@ -1,8 +1,17 @@
+@@ -1,8 +1,18 @@
 -# On Windows MSVC, statically link the C runtime so that the resulting EXE does
 -# not depend on the vcruntime DLL.
 -#
@@ -21,6 +21,7 @@ index 7db936b..17a3deb 100644
 +# -Ctarget-feature=+crt-static: Statically link the CRT (required to link the spectre-mitigated CRT).
 +[target.'cfg(target_os = "windows")']
 +rustflags = [
++    "-Cehcont_guard",
 +    "-Ccontrol-flow-guard",
 +    "-Ctarget-feature=+crt-static",
 +]