clucene: stop using #pragma GCC system_header

... it breaks dependency generation.

Change-Id: I992e47ecea697617820358f711b7a6408fdabbe3

external/clucene/patches/clucene-warnings.patch

 --- src/core/CLucene/analysis/AnalysisHeader.h	2012-02-22 12:37:22.531637934 +0000
 +++ src/core/CLucene/analysis/AnalysisHeader.h	2012-02-22 12:39:15.369916728 +0000
-@@ -7,6 +7,8 @@
+@@ -7,6 +7,12 @@
  #ifndef _lucene_analysis_AnalysisHeader_
  #define _lucene_analysis_AnalysisHeader_
  
-+#pragma GCC system_header
++#include <config_global.h>
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic push
++# pragma GCC diagnostic ignored "-Woverloaded-virtual"
++#endif
 +
  #include "CLucene/index/Payload.h"
  #include "CLucene/util/VoidList.h"
  #include "CLucene/LuceneThreads.h"
+@@ -361,4 +361,8 @@
+ };
+ 
+ CL_NS_END
++
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic pop
++#endif
+ #endif
 --- src/core/CLucene/search/Searchable.h	2012-02-22 12:37:22.513637729 +0000
 +++ src/core/CLucene/search/Searchable.h	2012-02-22 12:38:51.073641550 +0000
-@@ -7,6 +7,7 @@
+@@ -7,6 +7,12 @@
  #ifndef _lucene_search_Searcher_
  #define _lucene_search_Searcher_
  
-+#pragma GCC system_header
++#include <config_global.h>
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic push
++# pragma GCC diagnostic ignored "-Woverloaded-virtual"
++#endif
++
  
  //#include "CLucene/index/IndexReader.h"
  CL_CLASS_DEF(index,Term)
+@@ -180,4 +180,8 @@
+ 	};
+ 
+ CL_NS_END
++
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic pop
++#endif
+ #endif
 --- src/core/CLucene/store/IndexInput.h	2012-02-22 12:37:22.508637673 +0000
 +++ src/core/CLucene/store/IndexInput.h	2012-02-22 12:39:00.465747935 +0000
-@@ -7,6 +7,8 @@
+@@ -7,6 +7,12 @@
  #ifndef _lucene_store_IndexInput_
  #define _lucene_store_IndexInput_
  
-+#pragma GCC system_header
++#include <config_global.h>
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic push
++# pragma GCC diagnostic ignored "-Woverloaded-virtual"
++#endif
 +
  #include "CLucene/LuceneThreads.h"
  #include "CLucene/util/Equators.h"
  
+@@ -195,4 +195,8 @@
+ 		virtual void seekInternal(const int64_t pos) = 0;
+ 	};
+ CL_NS_END
++
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic pop
++#endif
+ #endif
 --- src/core/CLucene/util/Array.h	2012-02-22 12:37:22.510637696 +0000
 +++ src/core/CLucene/util/Array.h	2012-02-22 12:38:33.714444884 +0000
-@@ -7,6 +7,8 @@
+@@ -7,6 +7,12 @@
  #ifndef _lucene_util_Array_
  #define _lucene_util_Array_
  
-+#pragma GCC system_header
++#include <config_global.h>
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic push
++# pragma GCC diagnostic ignored "-Wshadow"
++#endif
 +
  #include <stdlib.h>
  #include <string.h>
  
+@@ -338,4 +338,8 @@
+ 
+ 
+ CL_NS_END
++
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic pop
++#endif
+ #endif
 --- src/core/CLucene/util/PriorityQueue.h	2012-02-22 12:37:22.510637696 +0000
 +++ src/core/CLucene/util/PriorityQueue.h	2012-02-22 12:38:40.316519685 +0000
-@@ -7,6 +7,8 @@
+@@ -7,6 +7,12 @@
  #ifndef _lucene_util_PriorityQueue_
  #define _lucene_util_PriorityQueue_
  
-+#pragma GCC system_header
++#include <config_global.h>
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic push
++# pragma GCC diagnostic ignored "-Wshadow"
++#endif
 +
  #include <stdlib.h>
  
  CL_NS_DEF(util)
+@@ -199,4 +199,8 @@
+ 	};
+ 
+ CL_NS_END
++
++#if defined(__GNUC__) && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE
++# pragma GCC diagnostic pop
++#endif
+ #endif