Add snapshot test for x clippy ci

Author: Kobzol

src/bootstrap/src/core/build_steps/clippy.rs

@@ -173,6 +173,10 @@ impl Step for Std {
             false,
         );
     }
+
+    fn metadata(&self) -> Option<StepMetadata> {
+        Some(StepMetadata::clippy("std", self.target))
+    }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
@@ -251,6 +255,10 @@ impl Step for Rustc {
             false,
         );
     }
+
+    fn metadata(&self) -> Option<StepMetadata> {
+        Some(StepMetadata::clippy("rustc", self.target))
+    }
 }
 
 #[derive(Debug, Clone, Hash, PartialEq, Eq)]
@@ -401,6 +409,10 @@ macro_rules! lint_any {
                     false,
                 );
             }
+
+            fn metadata(&self) -> Option<StepMetadata> {
+                Some(StepMetadata::clippy($readable_name, self.target))
+            }
         }
         )+
     }

src/bootstrap/src/core/builder/tests.rs

@@ -1835,6 +1835,51 @@ mod snapshot {
         [doc] Compiletest <host>
         ");
     }
+
+    #[test]
+    fn clippy_ci() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("clippy")
+                .path("ci")
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [check] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 0 <host> -> clippy-driver 1 <host>
+        [build] rustc 0 <host> -> cargo-clippy 1 <host>
+        [clippy] bootstrap <host>
+        [clippy] std <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [clippy] rustc <host>
+        [clippy] rustc 0 <host> -> rustc_codegen_gcc 1 <host>
+        ");
+    }
+
+    #[test]
+    fn clippy_ci_stage_2() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("clippy")
+                .path("ci")
+                .stage(2)
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [build] rustc 1 <host> -> rustc 2 <host>
+        [check] rustc 2 <host> -> rustc 3 <host>
+        [build] rustc 1 <host> -> clippy-driver 2 <host>
+        [build] rustc 1 <host> -> cargo-clippy 2 <host>
+        [clippy] bootstrap <host>
+        [clippy] std <host>
+        [build] rustc 2 <host> -> std 2 <host>
+        [clippy] rustc <host>
+        [build] rustc 0 <host> -> clippy-driver 1 <host>
+        [build] rustc 0 <host> -> cargo-clippy 1 <host>
+        [clippy] rustc 1 <host> -> rustc_codegen_gcc 2 <host>
+        ");
+    }
 }
 
 struct ExecutedSteps {