Removed a couple of static helpers in the data formatters, replaced with new general logic in StringLexer

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@222058 91177308-0d34-0410-b5e6-96231b3b80d8
Fix examine-threads to build for arm64.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@222059 91177308-0d34-0410-b5e6-96231b3b80d8