[Xcb] backward/forward binary compatibility checker

[Andrey Ponomarenko]

    Colleagues, I'm a lead developer from Institute for System
Programing of Russian Academy of Sciences and we are developing a free
lightweight tool for checking backward/forward binary compatibility of
shared C/C++ libraries in OS Linux. It checks interface signatures and
data type definitions in two library versions (headers and shared
objects) and searches differences that may lead to incompatibility
according to ABI standards. We have released beta version of this tool
and we'd like you to consider its usefulness for your project.
    The package with the latest version of tool is in the attachment.
The wiki-page of binary compatibility checker is
http://ispras.linux-foundation.org/index.php/ABI_compliance_checker