LLVM build fix.

Change-Id: If73376af1decf91999bda545e772419077d27ac9
diff --git a/src/compiler_llvm/jni_compiler.cc b/src/compiler_llvm/jni_compiler.cc
index 181f8c3..fdd2b43 100644
--- a/src/compiler_llvm/jni_compiler.cc
+++ b/src/compiler_llvm/jni_compiler.cc
@@ -28,6 +28,7 @@
 #include "runtime.h"
 #include "runtime_support_func.h"
 #include "stack.h"
+#include "thread.h"
 #include "utils_llvm.h"
 
 #include <llvm/BasicBlock.h>