Wire amdgpu into redox-drm packaging

local/recipes/gpu/redox-drm/recipe.toml

@@ -4,6 +4,12 @@ path = "source"
 [build]
 template = "cargo"
 dependencies = [
+    "amdgpu",
     "redox-driver-sys",
     "linux-kpi",
 ]
+
+[package]
+dependencies = [
+    "amdgpu",
+]

local/recipes/gpu/redox-drm/source/build.rs

@@ -31,6 +31,8 @@ fn find_amdgpu_dc_library(manifest_dir: &Path) -> Option<PathBuf> {
         }
     }
 
+    push_candidate_dirs(&mut candidates, &manifest_dir.join("../../amdgpu"));
+    push_candidate_dirs(&mut candidates, &manifest_dir.join("../../amdgpu/stage"));
     push_candidate_dirs(&mut candidates, &manifest_dir.join("../amdgpu"));
     push_candidate_dirs(&mut candidates, &manifest_dir.join("../amdgpu/stage"));