This is https://bugs.llvm.org/show_bug.cgi?id=40861,
Previously llvm-readobj would print the DT_NULL sometimes
for the dynamic section that has no terminator entry.
The logic of printDynamicTable was a bit overcomplicated.
I rewrote it slightly to fix the issue and commented.
Differential revision: https://reviews.llvm.org/D58716
llvm-svn: 355073