Use standard .gitignore file and layout

Reusing xorg code saves maintenance in the long term.

Now that m4/.gitignore is removed, the -I m4 ${ACLOCAL_FLAGS}
must be removed to avoid build breakage as m4 is generated and not
part of the git source.

Acked-by: Cyril Brulebois <kibi@debian.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Gaetan Nadon <memsize@videotron.ca>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/benchmarks/.gitignore b/benchmarks/.gitignore
new file mode 100644
index 0000000..ddea6f7
--- /dev/null
+++ b/benchmarks/.gitignore
@@ -0,0 +1,5 @@
+intel_upload_blit_large
+intel_upload_blit_large_gtt
+intel_upload_blit_large_map
+intel_upload_blit_small
+# Please keep sorted alphabetically