intel/compiler: Report the number of non-spill/fill SEND messages on vec4 too

intel/compiler: Report the number of non-spill/fill SEND messages on vec4 too

This make shader-db's report.py work on Haswell and earlier platforms.
The problem is that the script would detect the "sends" output for
scalar shaders and expect in in vec4 shaders too.  When it didn't find
it, the script would fail with:

    Traceback (most recent call last):
      File "./report.py", line 351, in <module>
        main()
      File "./report.py", line 182, in main
        before_count = before[p][m]
    KeyError: 'sends'

Fixes: f192741ddd8 ("intel/compiler: Report the number of non-spill/fill SEND messages")
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>