Skia: don't build tests
Skia: don't build tests

Change-Id: Id75e04c21c66ffff1575ff43abbe54784b9f9a2e

VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia,VRToxin-AOSP/android_external_skia