deb: ci test building gcc-15 from sid

src/deb/mod.rs

@@ -271,4 +271,15 @@ mod tests {
     async fn test_deb_hello_ubuntu_cross_end_to_end() {
         test_build_end_to_end("hello", "noble", None, Some("riscv64"), true).await;
     }
+
+    /// This is a specific test case for the latest gcc package on Debian
+    /// The GCC package is complex and hard to build, with specific stages
+    /// and system-bound scripts. Building it requires specific things that
+    /// we want to ensure are not broken.
+    #[tokio::test]
+    #[test_log::test]
+    #[serial]
+    async fn test_deb_gcc_debian_end_to_end() {
+        test_build_end_to_end("gcc-15", "sid", None, None, false).await;
+    }
 }