ci: enable Cgo-based ARM build

Author: sbinet

.github/workflows/ci.yml

@@ -49,7 +49,7 @@ jobs:
     - name: Build-Linux-32b-arm
       if: matrix.platform == 'ubuntu-latest'
       run: |
-        GOARCH=arm CGO_ENABLED=0 \
+        GOARCH=arm CGO_ENABLED=1 \
             CC=arm-linux-gnueabihf-gcc \
             CC_FOR_TARGET=arm-linux-gnueabihf-gcc \
             go install -v ./...