uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/applications/virtualization/crosvm/default-seccomp-policy-dir.diff

@@ -0,0 +1,15 @@
+diff --git a/src/crosvm.rs b/src/crosvm.rs
+index b7055df..5989c87 100644
+--- a/src/crosvm.rs
++++ b/src/crosvm.rs
+@@ -141,7 +141,9 @@ impl Default for Config {
+             x_display: None,
+             shared_dirs: Vec::new(),
+             sandbox: !cfg!(feature = "default-no-sandbox"),
+-            seccomp_policy_dir: PathBuf::from(SECCOMP_POLICY_DIR),
++            seccomp_policy_dir: PathBuf::from(
++                option_env!("DEFAULT_SECCOMP_POLICY_DIR").unwrap_or(SECCOMP_POLICY_DIR),
++            ),
+             seccomp_log_failures: false,
+             cras_audio: false,
+             cras_capture: false,