Compile SkJpegCodec on bzl iOS build

BUG=skia:

Change-Id: I7ffb33bc4b215874821d6797e7795e8dd59467ee
Reviewed-on: https://skia-review.googlesource.com/8312
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
1 file changed