add support for JIT compilation

lib/lepton/asmjit/asmjit.h

@@ -0,0 +1,33 @@
+// This file is part of AsmJit project <https://asmjit.com>
+//
+// SPDX-License-Identifier: Zlib
+// Official GitHub Repository: https://github.com/asmjit/asmjit
+//
+// Copyright (c) 2008-2021 The AsmJit Authors
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+#ifndef ASMJIT_ASMJIT_H_INCLUDED
+#define ASMJIT_ASMJIT_H_INCLUDED
+
+#include "./core.h"
+
+#ifndef ASMJIT_NO_X86
+  #include "./x86.h"
+#endif
+
+#endif // ASMJIT_ASMJIT_H_INCLUDED