add DEBUG_LIBSTDCXX option to GNU Make gcc for libstdc++ debug

[zingale]

this catches bounds errors in the standard library containers

Summary

Additional background

Checklist

The proposed changes:

• [ ] fix a bug or incorrect behavior in AMReX
• [ ] add new capabilities to AMReX
• [ ] changes answers in the test suite to more than roundoff level
• [ ] are likely to significantly affect the results of downstream AMReX users
• [ ] include documentation in the code and/or rst files, if appropriate

[zingale]

see: https://gcc.gnu.org/onlinedocs/libstdc++/manual/debug_mode_using.html

[zingale]

not sure if we need this as an option so I left it WIP. It doesn't find issues in Castro. I am not sure how much of the standard library containers we rely on.

[WeiqunZhang]

Since the new option is opt-in, there is no harm I guess.