ClangTidy fixes

Change-Id: I0ed084f56ce2ce268fd353ae3150dd11e759fa66

internal/ceres/block_jacobi_preconditioner.cc

diff --git a/internal/ceres/block_jacobi_preconditioner.cc b/internal/ceres/block_jacobi_preconditioner.cc
index 81eb419..8136f73 100644
--- a/internal/ceres/block_jacobi_preconditioner.cc
+++ b/internal/ceres/block_jacobi_preconditioner.cc
@@ -31,7 +31,9 @@
 #include "ceres/block_jacobi_preconditioner.h"
 
 #include <memory>
+#include <mutex>
 #include <utility>
+#include <vector>
 
 #include "Eigen/Dense"
 #include "ceres/block_random_access_diagonal_matrix.h"