[Bug 31836] Add support for GStreamer 1.0 API/ABI

https://bugs.winehq.org/show_bug.cgi?id=31836

--- Comment #37 from Rafał Mużyło  ---
The way I read wine's configure.ac and glibconfig.h, the check you really want
here is slightly different and in a slightly different position.

Namely, first the checks AC_CHECK_HEADER/AC_CHECK_LIB should run.
Then, if they succeed, the next check to run would be AC_COMPILE_IFELSE for
'GLIB_SIZEOF_LONG == sizeof(long)'.
If that fails, you want to AC_MSG_ERROR right here, cause this would mean
exactly that the mentioned toolchain mistake took place.