Update clang-format rules to better follow Skia style.
Update clang-format rules to better follow Skia style.

This change should keep clang-format from squishing every constructor
initializer onto a single line.

This is a followup from CL comments on http://review.skia.org/563517

Change-Id: Ieb436e3a0699df638792fbd8507af20b301ad5d9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/565002
Commit-Queue: Greg Daniel <39df0a804564ccb6cf75f18db79653821f37c1c5@google.com>
Commit-Queue: John Stiles <f4fcf42d3bb5924557f1eeb3be66747535e585da@google.com>
Auto-Submit: John Stiles <f4fcf42d3bb5924557f1eeb3be66747535e585da@google.com>
Reviewed-by: Greg Daniel <39df0a804564ccb6cf75f18db79653821f37c1c5@google.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia