Fix #ifdef SK_SUPPORT_GPU to be #if

We define this to be 1 or 0, so #ifdef is not what
was intended.

Change-Id: I0182718980c39dced98bf90255703a6f080f9cac
Bug: skia:12584
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/468956
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
2 files changed