Add missing error report

Use the same error message as in WheelBuilder.build(),
include the exception in the message.

src/pip/_internal/wheel_builder.py

@@ -375,7 +375,11 @@ class WheelBuilder(object):
                                 wheel_hash.hexdigest())
                     logger.info('Stored in directory: %s', output_dir)
                     return dest_path
-                except Exception:
+                except Exception as e:
+                    logger.warning(
+                        "Building wheel for %s failed: %s",
+                        req.name, e,
+                    )
                     pass
             # Ignore return, we can't do anything else useful.
             self._clean_one(req)