[lottiecap] Moved over from buildbot repo.

Command line application to build a 5x5 filmstrip
from a Lottie file in Chrome headless and then export
that filmstrip in a 1000x1000 PNG.

Bug: skia:
Change-Id: I38decac363f2d592fddc28b3f4ca9450c5851ac6
Reviewed-on: https://skia-review.googlesource.com/115100
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
diff --git a/.gitignore b/.gitignore
index d70389d..cb51cb2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -48,3 +48,6 @@
 
 vulkan-out
 gl-out
+
+node_modules
+tools/lottiecap/filmstrip.png