fix header file paths of gflags, commit 4, test=develop (#30274)

paddle/fluid/string/pretty_log.cc

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 #include "paddle/fluid/string/pretty_log.h"
-#include <gflags/gflags.h>
+#include "gflags/gflags.h"
 
 DEFINE_bool(color, true, "Whether to turn on pretty log");
 

paddle/fluid/string/pretty_log.h

@@ -13,11 +13,11 @@
 // limitations under the License.
 #pragma once
 
-#include <gflags/gflags.h>
 #include <iostream>
 #include <sstream>
 #include <string>
 #include <utility>
+#include "gflags/gflags.h"
 
 #include "paddle/fluid/string/printf.h"