objconv 2.36 (new formula) object and executable utilities

objconv is a utility for cross-platform development of function libraries, for converting and modifying object files and for dumping and disassembling object and executable files for all x86 and x86-64 platforms.

objconv formulas have been submitted twice before (#10441 and #17153), however neither formula was audited or tested. In fact, neither formula would install because of a nested archive.
Something like:
```ruby
system ENV.cxx", "-o", "objconv", "1.cpp", "2.cpp", *ENV.cxxflags
```