Fix fuschia roll

Only call png_set_option ifdef PNG_SET_OPTION_SUPPORTED.

Change-Id: Ib3d03e15b12b6229f98544b195a6bc32b5aa2f0f
Reviewed-on: https://skia-review.googlesource.com/111601
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
1 file changed