chromeos-dbus-bindings-rust: Require the newest version of dbus-codegen.

BUG=chromium:1129542
TEST=emerge-${BOARD} chromeos-dbus-bindings-rust

Change-Id: I87aebbc1107caf1a83a79831a5a152c25559be90
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2417359
Tested-by: Allen Webb <allenwebb@google.com>
Commit-Queue: Allen Webb <allenwebb@google.com>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
diff --git a/chromeos-base/chromeos-dbus-bindings-rust/chromeos-dbus-bindings-rust-9999.ebuild b/chromeos-base/chromeos-dbus-bindings-rust/chromeos-dbus-bindings-rust-9999.ebuild
index 404dffc..6816dbe 100644
--- a/chromeos-base/chromeos-dbus-bindings-rust/chromeos-dbus-bindings-rust-9999.ebuild
+++ b/chromeos-base/chromeos-dbus-bindings-rust/chromeos-dbus-bindings-rust-9999.ebuild
@@ -17,7 +17,7 @@
 SLOT="0/${PVR}"
 KEYWORDS="~*"
 
-BDEPEND=dev-rust/dbus-codegen
+BDEPEND=">=dev-rust/dbus-codegen-0.5.0"
 
 src_unpack() {
 	cros-workon_src_unpack