* A lot of `tapi installapi` options are already shared with clang, but
not all. This patch handles installapi-specific options by filtering for
them in the initial argv input, then passing the rest to the clang
driver.
* Installapi not only generates a text file but also reports to library
developers when there are inconsistencies between an interface and its
implementation. To allow this, add support for reporting installapi
diagnostics. This will be leveraged in the verifier service.
* Include whether functions are inlinable as they impact whether to add
them into the tbd file and for future verification.
* Fix how clang arguments got passed along, previously spacing was
passed along to CC1 causing search path inputs to look non-existent.
