[bazel] Add location for G3 define
[bazel] Add location for G3 define

Change-Id: I7811e0e70e4959be8caa1cab9e4f1fa3421d72d1
Bug: skia:13211
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/536596
Reviewed-by: Jorge Betancourt <63f45fa27f6ebe96d0924e755262c906d4cb18db@google.com>

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