Set mime-type for wasm files.
Set mime-type for wasm files.

Bug: skia:
Change-Id: Id12b30ffbb7c6528c4b89c2b36dfad93dabda28c
Reviewed-on: https://skia-review.googlesource.com/c/182540
Commit-Queue: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Auto-Submit: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot