test: add WebAssembly tests

.circleci/config.yml

@@ -23,6 +23,7 @@ commands:
                 llvm<<parameters.llvm>>-dev \
                 clang<<parameters.llvm>> \
                 libclang<<parameters.llvm>>-dev \
+                lld<<parameters.llvm>> \
                 gcc-arm-linux-gnueabihf \
                 binutils-arm-none-eabi \
                 libc6-dev-armel-cross \
@@ -32,6 +33,15 @@ commands:
                 qemu-user \
                 gcc-avr \
                 avr-libc
+  install-node:
+    steps:
+      - run:
+          name: "Install node.js"
+          command: |
+            wget https://nodejs.org/dist/v10.15.1/node-v10.15.1-linux-x64.tar.xz
+            sudo tar -C /usr/local -xf node-v10.15.1-linux-x64.tar.xz
+            sudo ln -s /usr/local/node-v10.15.1-linux-x64/bin/node /usr/bin/node
+            rm node-v10.15.1-linux-x64.tar.xz
   dep:
     steps:
       - run:
@@ -70,6 +80,7 @@ jobs:
       - submodules
       - apt-dependencies:
           llvm: "-7"
+      - install-node
       - restore_cache:
           keys:
             - go-cache-{{ checksum "Gopkg.lock" }}-{{ .Environment.CIRCLE_PREVIOUS_BUILD_NUM }}