benchmarks: Benchmarkify gem_exec_nop

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/benchmarks/Makefile.sources b/benchmarks/Makefile.sources
index 60bdae2..d8a7440 100644
--- a/benchmarks/Makefile.sources
+++ b/benchmarks/Makefile.sources
@@ -3,4 +3,5 @@
 	intel_upload_blit_large_gtt     \
 	intel_upload_blit_large_map     \
 	intel_upload_blit_small		\
+	gem_exec_nop			\
 	gem_userptr_benchmark