Handle non-default targets in the graph endpoint

Author: Kobzol

database/src/selector.rs

@@ -217,6 +217,11 @@ impl CompileBenchmarkQuery {
         self
     }
 
+    pub fn target(mut self, selector: Selector<Target>) -> Self {
+        self.target = selector;
+        self
+    }
+
     pub fn metric(mut self, selector: Selector<Metric>) -> Self {
         self.metric = selector.map(|v| v.as_str().into());
         self

site/src/request_handlers/graph.rs

@@ -231,6 +231,7 @@ async fn create_graphs(
                 .profile(profile_selector)
                 .scenario(scenario_selector)
                 .backend(Selector::One(CodegenBackend::Llvm))
+                .target(Selector::One(Target::X86_64UnknownLinuxGnu))
                 .metric(Selector::One(request.stat.parse()?)),
             artifact_ids.clone(),
         )