Patch implements parser of pubnames/pubtypes tables instead of static
function used before. It is now should be possible to reuse it
in LLD or other projects and clean up the duplication code.
Differential revision: https://reviews.llvm.org/D27851
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290040 91177308-0d34-0410-b5e6-96231b3b80d8
