Make arm/table_encode.c and decode_private.h agree on op_instr type. (#2952)
Make arm/table_encode.c and decode_private.h agree on op_instr type. (#2952)

Remove unnecessary const from op_instr extern declaration, caught by
GCC 7.3's -Wduplicate-decl-specifier.

Thanks to Edmund Grimley-Evans <Edmund.Grimley-Evans@arm.com> for raising the
issue.
AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio