make, unlike ninja, will not create output directories prior to
running commands. Have idlgen create the output directories before
attempting to generate the files.
Clean up the generated directory structure. Piggyback off the
existing DAWN_BUILD_GEN_DIR variable instead of starting a new
gen directory at <build>/<subdir>/<gen>/<subdir>.
Add Kokoro tests for building dawn node.
Change-Id: Ic079ee96f4beaa1f9c3da98495bed6757f557839
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/88447
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
d6bc9c21ba