Move fBufferValid to a bitfield and update the corresponding tests in rpcrt4.
Add tests for the new fields.

ole32: Include compobj_private.h in oleobj.c to type-check the function signatures of DataAdviseHolder_OnConnect and DataAdviseHolder_OnDisconnect.

ole32: Include ole2.h in ole32_main.c to type-check the function signature of OleMetafilePictFromIconAndLabel.

Currently only GetTextFaceA is tested, and in an ancillary way, and the
behavior differs from GetTextFaceW.

If the the socket is connected and lpFrom is not NULL, Linux will set
msg_namelen to zero and ignore msg_name in recvfrom so don't try try
to update lpFrom.