This is an empty test to begin with and its sole purpose for now is to
make sure abg-cxx-compat.h can be compiled on its own.
* tests/Makefile.am: Add new test case runtestcxxcompat.
* tests/test-cxx-compat.cc: New test source file.
Reviewed-by: Giuliano Procida <gprocida@google.com>
Signed-off-by: Matthias Maennich <maennich@google.com>
