objdump: New feature of displaying global variable information

[Guillaume VACHERIAS]

Hello Jan,

I apologize for the delay in my response regarding the new feature of objdump
for displaying global variable information that you've reviewed previously.

I have recoded the mechanism, and I hope the implementation is clearer now.
I have also taken into account previous comments and suggestions in this
updated version.

Thank you again for your feedback and patience.

Best Regards,
Guillaume Vacherias