Proposed ABI break in libdri for 7.0

[Paul Mackerras]

Adam Jackson writes:

> Are there any other known LP64 issues in DRI we should be taking care of at 
> the same time?  We're allowed to break ABIs for this if it makes a cleaner 
> solution.

Yes, there are the handles that are passed from the server to the
client in the RADEONDRIRec and other similar "dev private" blobs.
Currently they are unsigned long.  We should make them either a 64-bit
type or an array of two 32-bit fields (with a defined ordering).

Paul.