projects: minijail: add bindgen dependency

This was previously missing, but other projects pulled in bindgen
anyway, so it did not cause a build failure.

BUG=None
TEST=emerge-$BOARD dev-rust/minijail-sys

Cq-Depend: chromium:4112273
Change-Id: I0a6c23b0312ceddaddd90a790211044d04503bdd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/rust_crates/+/4112604
Commit-Queue: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Allen Webb <allenwebb@google.com>
diff --git a/projects/platform/minijail/rust/minijail-sys/Cargo.toml b/projects/platform/minijail/rust/minijail-sys/Cargo.toml
index 9db3b65..593058b 100644
--- a/projects/platform/minijail/rust/minijail-sys/Cargo.toml
+++ b/projects/platform/minijail/rust/minijail-sys/Cargo.toml
@@ -10,5 +10,6 @@
 libc = "0.2.44"
 
 [build-dependencies]
+bindgen = "0.60"
 pkg-config = "0.3"
 which = "4.0.0"