Fix compile bug on RHEL6 due to missing header

Fixes compilation error: ‘lower_bound’ was not declared in this scope

Change-Id: I00a32edbb3f7f52c1d09ca4c1ef5ec48692b7748

internal/ceres/compressed_col_sparse_matrix_utils.cc

diff --git a/internal/ceres/compressed_col_sparse_matrix_utils.cc b/internal/ceres/compressed_col_sparse_matrix_utils.cc
index ba76dad..b62a6ed 100644
--- a/internal/ceres/compressed_col_sparse_matrix_utils.cc
+++ b/internal/ceres/compressed_col_sparse_matrix_utils.cc
@@ -31,6 +31,7 @@
 #include "ceres/compressed_col_sparse_matrix_utils.h"
 
 #include <vector>
+#include <algorithm>
 #include "ceres/internal/port.h"
 #include "glog/logging.h"