[demangler] All <qualifiers> on one type should share one entry in the substitution table.

Previously, both <extended-qualifier>s and <CV-qualifiers> got their own entries.

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@324968 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed