[PATCH] Transform all files in a compilation database if no source files are provided.

[Ariel Bernal]

  @revane Here I'll try to summarize the possible cases:
  1) FixCompilationDatabase:
    * if the user specifies --
    * if no compilation database can be detected from Source0
  2) JSONCompilationDatabase:
    * if the user specifies -p <Subdir>
       - if sources are not specified we populate Sources from the compilation database.
    * if a compilation database can detected from Source0

  Now if the user specifies -include/include-from-file I think we should filter out the Sources added from the compilation database but not sources explicitly provided by the user.
  I mean suppose the following case
    cpp11-migrate -include test_dir myfile.cpp test/myfile2.cpp
  ##myfile2.cpp## will be transform but ##myfile.cpp## won't since is not in the include list (maybe another argument against using the same include for headers and sources?). In this case me may just want to ignore -include for sources.
  Do you agree with this?

  Your idea of populating IncludeExcludeInfo from the sources if the user doesn't specify -include/include-from-file can be done after the Sources are populated.

http://llvm-reviews.chandlerc.com/D1517