Added line numbers to DSLParser type errors

Change-Id: I2fb227d74279e38118fc466718ca742221888443
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/444877
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
3 files changed