Move StringExtractorGDBRemote.h to the include folder

While trying to use this header I noticed that it is not in the include
folder. Move it to there and update all #includes to reference that file
correctly.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@327996 91177308-0d34-0410-b5e6-96231b3b80d8
12 files changed