Place warning pragmas for LLVM includes in separated files

libevmjit/ExecutionEngine.cpp

@@ -2,19 +2,15 @@
 
 #include <chrono>
 #include <cstdlib>	// env options
-
+#include "preprocessor/llvm_includes_start.h"
 #include <llvm/IR/Module.h>
 #include <llvm/ADT/Triple.h>
-#pragma warning(push)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-parameter"
 #include <llvm/ExecutionEngine/ExecutionEngine.h>
 #include <llvm/ExecutionEngine/SectionMemoryManager.h>
-#pragma warning(pop)
-#pragma GCC diagnostic pop
 #include <llvm/ExecutionEngine/MCJIT.h>
 #include <llvm/Support/TargetSelect.h>
 #include <llvm/Support/Host.h>
+#include "preprocessor/llvm_includes_end.h"
 
 #include "Runtime.h"
 #include "Compiler.h"

libevmjit/preprocessor/llvm_includes_end.h

@@ -0,0 +1,3 @@
+
+#pragma warning(pop)
+#pragma GCC diagnostic pop

libevmjit/preprocessor/llvm_includes_start.h

@@ -0,0 +1,4 @@
+
+#pragma warning(push)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"