Exclude gl files for Fuchsia platform.
Exclude gl files for Fuchsia platform.

Fuchsia platform supports only vulkan. So exclude all gl files and
add vulkan files for building Skia on Fuchsia.

(relanding with build fix)

Change-Id: Id2ba6cb2d25f6a8c52515ef11b88d830a610903d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/301920
Reviewed-by: Mike Klein <14574f09dfa9b4e14759b88c3426a495a0e627b0@google.com>
Commit-Queue: Mike Klein <14574f09dfa9b4e14759b88c3426a495a0e627b0@google.com>

aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia