include: Make sure that Unix function tables are always const.

dlls/win32u/syscall.c

@@ -465,7 +465,7 @@ static NTSTATUS init( void *dispatcher )
     return ntdll_init_syscalls( &syscall_table, dispatcher );
 }
 
-unixlib_entry_t __wine_unix_call_funcs[] =
+const unixlib_entry_t __wine_unix_call_funcs[] =
 {
     init,
 };

include/wine/unixlib.h

@@ -29,6 +29,9 @@ typedef UINT64 unixlib_handle_t;
 
 typedef NTSTATUS (*unixlib_entry_t)( void *args );
 
+extern const unixlib_entry_t __wine_unix_call_funcs[];
+extern const unixlib_entry_t __wine_unix_call_wow64_funcs[];
+
 /* some useful helpers from ntdll */
 extern const char *ntdll_get_build_dir(void);
 extern const char *ntdll_get_data_dir(void);