We have a logic that adds a few sections implicitly.
Though the SHT_NULL section with section number 0
is an exception.
In D64913 I want to teach yaml2obj to redefine the null section.
And in this patch I add it to the sections list,
to make it kind of a regular section.
Differential revision: https://reviews.llvm.org/D65087
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@366785 91177308-0d34-0410-b5e6-96231b3b80d8