clang-tlb-import: check registry before adding compound

somehow the "checkRegisterContainer" does not do its job. at least it looks
like. well, better safe than sorry -- adding a check.

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>
clang-tlb-import: add "base_classes" to meta-data

adding all base-classes of a opaqued (nice verb...) record to the
database, without qualifiers or tag. also test-case with the
"classes.opaques" file.

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>
clang-tlb-import: current set of tlb-files

as they are generated by the tool on my machine. note that the meta-data
contains the full path of the headers, which naturally contains my
home-folder...

the only example currently not working at all is "consts.h", the tlb is
excluded.

the others where not viewed at yet... commited just for later record.

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>