Update lzma_sdk sources to 15.14.

third_party/lzma_sdk/7zBuf.h

 /* 7zBuf.h -- Byte Buffer
-2009-02-07 : Igor Pavlov : Public domain */
+2013-01-18 : Igor Pavlov : Public domain */
 
 #ifndef __7Z_BUF_H
 #define __7Z_BUF_H
 
-#include "Types.h"
+#include "7zTypes.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+EXTERN_C_BEGIN
 
 typedef struct
 {
   Byte *data;
   size_t size;
 } CBuf;
 
 void Buf_Init(CBuf *p);
 int Buf_Create(CBuf *p, size_t size, ISzAlloc *alloc);
 void Buf_Free(CBuf *p, ISzAlloc *alloc);
 
 typedef struct
 {
   Byte *data;
   size_t size;
   size_t pos;
 } CDynBuf;
 
 void DynBuf_Construct(CDynBuf *p);
 void DynBuf_SeekToBeg(CDynBuf *p);
 int DynBuf_Write(CDynBuf *p, const Byte *buf, size_t size, ISzAlloc *alloc);
 void DynBuf_Free(CDynBuf *p, ISzAlloc *alloc);
 
-#ifdef __cplusplus
-}
-#endif
+EXTERN_C_END
 
 #endif