igt: Drop Intel from the name in docs and paths

This is just a simple change to reflect the actual state. No rewording
yet, just a simple substitution in most visible places - docs, README
and paths.

There are probably some leftovers here and there, but we can let them be
for now, this is already well overdue.

v2: fixed couple of obvious leftovers pointed out by Petri

Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
diff --git a/benchmarks/Makefile.sources b/benchmarks/Makefile.sources
index d150035..86928df 100644
--- a/benchmarks/Makefile.sources
+++ b/benchmarks/Makefile.sources
@@ -1,4 +1,4 @@
-benchmarksdir=$(libexecdir)/intel-gpu-tools/benchmarks
+benchmarksdir=$(libexecdir)/igt-gpu-tools/benchmarks
 
 benchmarks_prog_list =			\
 	gem_blt				\