[bazel] Fix libwebp compilation after roll
[bazel] Fix libwebp compilation after roll

Change-Id: Id58e0a7cb2a0a1316f530138c018f970fd649791
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/559718
Commit-Queue: Leon Scroggins <995cad867ca30d6399abe011583a53547c8afea1@google.com>
Auto-Submit: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Reviewed-by: Leon Scroggins <995cad867ca30d6399abe011583a53547c8afea1@google.com>
Reviewed-by: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia