[Piglit] running piglit on ppc64 be against llvmpipe

[Dave Airlie]

There is probably some python problem, but when I run piglit master on
RHEL7.0 on ppc64 big-endian, the run script seems to get very confused

[00000/15338]  Running Test(s): 00000 00001 00002 00003 00004 00005
00006 00007 00008 00009 00010 00011 00012 00013 00014 00015 00016
00017 00018 00019 00020 00021 00022 00023 00024 00025 00026 00027
00028 00029 00030 00031 00032 00033 00034 00035 [00001/15338] fail: 1
Running Test(s): 00000 00001 00002 00003 00004 00005 00006 00007 00008
00009 00010 00011 00012 00013 00014 00015 00016 00017 00018 00019
00020 00021 00022 00023 00024 00025 00026 00027 00028 00029 00030
00031 00032 00033 00034

Now I only have 15 cores from what I can see, so I'm not sure why it
spawns so many tests, however it also fails to ever reap any of the
tests so the running tests numbers keep building for ever.

I haven't tested it on x86 yet, but its wierd, and I've no idea how to debug it!

Dave.