[DWARF] Support types CU list in .gdb_index dumping

Some executables have non-empty types CU list and -gdb-index would report "<error reporting>" before.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@346181 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed