mdbx: add LIBMDBX_INLINE_API (both inline and non-inline of some API functions).

Change-Id: I00c2b6d3d2a0467080791ea0c1c2242742a20c78

src/internals.h

@@ -16,6 +16,11 @@
 #include MDBX_CONFIG_H
 #endif
 
+#define LIBMDBX_INTERNALS
+#ifdef MDBX_TOOLS
+#define MDBX_DEPRECATED
+#endif /* MDBX_TOOLS */
+
 /* *INDENT-OFF* */
 /* clang-format off */
 
@@ -96,11 +101,6 @@
 #pragma warning(disable : 4505) /* unreferenced local function has been removed */
 #endif                          /* _MSC_VER (warnings) */
 
-#if defined(MDBX_TOOLS)
-#undef MDBX_DEPRECATED
-#define MDBX_DEPRECATED
-#endif /* MDBX_TOOLS */
-
 #include "../mdbx.h"
 #include "defs.h"