builder: add test to check for changes in binary size

This test only applies when using the built-in LLVM version. This way,
we have a stable LLVM version to test against. Distribution versions of
LLVM (especially Debian) tend to be patched in a way that affect the
results.

.github/workflows/build-macos.yml

@@ -87,6 +87,8 @@ jobs:
       - name: Build wasi-libc
         if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
         run: make wasi-libc
+      - name: make gen-device
+        run: make -j3 gen-device
       - name: Test TinyGo
         shell: bash
         run: make test GOTESTFLAGS="-short"

.github/workflows/windows.yml

@@ -97,6 +97,8 @@ jobs:
       - name: Install wasmtime
         run: |
           scoop install wasmtime
+      - name: make gen-device
+        run: make -j3 gen-device
       - name: Test TinyGo
         shell: bash
         run: make test GOTESTFLAGS="-short"