Enable debug assertions in libstdc++

[pfultz2]

Adds a jenkins job that will run the unit tests with debug mode with libstdc++. To fix the debug issues I wrapped the instruction_ref in a class(actually reused the class thats used on windows).

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3924      +/-   ##
===========================================
+ Coverage    92.03%   92.05%   +0.02%     
===========================================
  Files          530      530              
  Lines        24509    24558      +49     
===========================================
+ Hits         22556    22605      +49     
  Misses        1953     1953              

Files with missing lines	Coverage Δ
src/fuse_concat.cpp	96.67% <100.00%> (ø)
src/include/migraphx/instruction_ref.hpp	100.00% <100.00%> (ø)
src/include/migraphx/iterator.hpp	100.00% <100.00%> (ø)
src/include/migraphx/op/name.hpp	100.00% <100.00%> (ø)
src/instruction.cpp	88.39% <100.00%> (+0.09%)	:arrow_up:

... and 6 files with indirect coverage changes

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