[nit] object.cc: pramga -> pragma
[nit] object.cc: pramga -> pragma

TEST=None; this is a comment typo.

Change-Id: I1fb87af0487bdaf735f8a53dd97f5ad2f0669432
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/176661
Commit-Queue: Clement Skau <495593248b6158163719b90dde8357b589c8e5d0@google.com>
Reviewed-by: Clement Skau <495593248b6158163719b90dde8357b589c8e5d0@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk