Module names in torque are allowed to have underscores but not dashes.
To stay consistent with C++ file naming conventions, the underscores
in module names are replaced by dashes for file names.

Example:

module typed_array {} would now generate:
builtins-typed-array-from-dsl-gen.(cc|h)

instead of:
builtins-typed_array-from-dsl-gen.(cc|h)

R=danno@chromium.org

Change-Id: Iff42d7b9b5f65c378ee30f9d884ab6a3a3cd42a7
Reviewed-on: https://chromium-review.googlesource.com/1016460Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52686}