[tools] Default CMake build with DAWN_BUILD_NODE_BINDINGS enabled

This is probably now the number one reason for building Dawn with CMake.

Change-Id: I08b51b9bf601a11e50e8549a2ff6520a583f8e28
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/177540
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>

tools/setup-build

diff --git a/tools/setup-build b/tools/setup-build
index 86df11f..16f0558 100755
--- a/tools/setup-build
+++ b/tools/setup-build
@@ -163,6 +163,7 @@
     CMAKE_FLAGS+=("-DTINT_BUILD_MSL_WRITER=1")
     CMAKE_FLAGS+=("-DTINT_BUILD_SPV_WRITER=1")
     CMAKE_FLAGS+=("-DTINT_BUILD_WGSL_WRITER=1")
+    CMAKE_FLAGS+=("-DDAWN_BUILD_NODE_BINDINGS=1")
     if [[ -x $(command -v ccache) ]]; then
       CMAKE_FLAGS+=("-DCMAKE_CXX_COMPILER_LAUNCHER=ccache")
     fi