Specify both paths for x_server_pixel_buffer.cc in cfi blacklist

This is needed because the WebRTC change is moving the files and the
lack of the new entry in the blacklist will cause a crash in
content_unittests's DesktopCaptureDeviceTest.Capture. See
https://bugs.chromium.org/p/chromium/issues/detail?id=901319#c14.

Bug: 901319
Change-Id: I547c663c42a315841415032a6d53141a051ad402
Reviewed-on: https://chromium-review.googlesource.com/c/1325801Reviewed-by: Patrik Höglund <phoglund@chromium.org>
Reviewed-by: Michael Moss <mmoss@chromium.org>
Reviewed-by: Peter Collingbourne <pcc@chromium.org>
Commit-Queue: Tomáš Popela <tomas.popela@gmail.com>
Cr-Commit-Position: refs/heads/master@{#607353}

tools/cfi/blacklist.txt

@@ -158,7 +158,10 @@ src:*ui/accessibility/platform/ax_platform_node_auralinux.cc
 src:*ui/accessibility/platform/ax_platform_atk_hyperlink.cc
 
 src:*chrome/browser/ui/zoom/chrome_zoom_level_prefs.cc
+# Temporary needs both paths until the WebRTC changed is rolled in again
+# see https://bugs.chromium.org/p/chromium/issues/detail?id=901319#c14
 src:*third_party/webrtc/modules/desktop_capture/x11/x_server_pixel_buffer.cc
+src:*third_party/webrtc/modules/desktop_capture/linux/x_server_pixel_buffer.cc
 src:*media/cdm/*
 src:*third_party/swiftshader/*
 src:*base/native_library_unittest.cc