Fix BUILD.gn on Fuchsia am: 31855e4e56 am: bdc475a8e1 am: 66e7cce47e

Original change: https://googleplex-android-review.googlesource.com/c/device/generic/goldfish-opengl/+/11603989

Change-Id: I1d7f330c261fd06a6935f7e0b7d6dc8477976b46