Use full include path in core/include/fpdfapi

core/include/fpdfapi/fpdf_serial.h

Index: core/include/fpdfapi/fpdf_serial.h
diff --git a/core/include/fpdfapi/fpdf_serial.h b/core/include/fpdfapi/fpdf_serial.h
index b0989f7f350d104c7eaec606acc757e84e4ec11b..5f493c436576e48e497edb95cce2b5921ca2a28f 100644
--- a/core/include/fpdfapi/fpdf_serial.h
+++ b/core/include/fpdfapi/fpdf_serial.h
@@ -7,12 +7,14 @@
 #ifndef CORE_INCLUDE_FPDFAPI_FPDF_SERIAL_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_SERIAL_H_
 
-#include "fpdf_page.h"
-#include "fpdf_pageobj.h"
+#include "core/include/fpdfapi/fpdf_page.h"
+#include "core/include/fpdfapi/fpdf_pageobj.h"
 
 class CPDF_ObjectStream;
 class CPDF_XRefStream;
+
 CFX_ByteTextBuf& operator<<(CFX_ByteTextBuf& buf, const CPDF_Object* pObj);
+
 #define FPDFCREATE_INCREMENTAL 1
 #define FPDFCREATE_NO_ORIGINAL 2
 #define FPDFCREATE_PROGRESSIVE 4