Add test jpg files to jpeg_decode_accelerator_unittest's data.

I'd like to run this test (and others) on chromeos bots on chrome's CQ.
Chrome's test dependency management works a little different than
cros's/autotest's. We push to the cros device only the test target's
runtime deps (as determined by GN). Consequently, we get ENOENTs due to
these missing images. This'll fix that.

Bug: 860066
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I9b2fc1deed0bbefcfa9fccc51969571b8056f30e
Reviewed-on: https://chromium-review.googlesource.com/1138752Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575465}

media/gpu/BUILD.gn

@@ -550,6 +550,12 @@ if (use_v4l2_codec || use_vaapi) {
       "jpeg_decode_accelerator_unittest.cc",
       "test/video_accelerator_unittest_helpers.h",
     ]
+    data = [
+      "//media/test/data/peach_pi-1280x720.jpg",
+      "//media/test/data/peach_pi-40x23.jpg",
+      "//media/test/data/peach_pi-41x22.jpg",
+      "//media/test/data/peach_pi-41x23.jpg",
+    ]
     if (use_x11) {
       deps += [ "//ui/gfx/x" ]
     }