learn from PR builds too

Author: pietroalbini

src/bin/server/worker.rs

@@ -171,11 +171,11 @@ impl Worker {
         if !outcome.is_passed() {
             self.report_failed(build_id, build.as_ref())?;
         }
-        if build.pr_number().is_none() && build.branch_name() == "auto" {
+        if build.pr_number().is_some() || build.branch_name() == "auto" {
             info!("learning from the log");
             self.learn(build.as_ref())?;
         } else {
-            info!("did not learn as it's not an auto build");
+            info!("did not learn as it's not an auto build or a PR build");
         }
 
         Ok(ProcessOutcome::Continue)