Persist PKG_CONFIG_PATH

Author: tannewt

.github/actions/deps/ports/zephyr-cp/action.yml

@@ -7,9 +7,9 @@ runs:
       if: runner.os == 'Linux'
       run: |
         sudo dpkg --add-architecture i386
-        export PKG_CONFIG_PATH=/usr/lib/i386-linux-gnu/pkgconfig
         sudo apt-get update
         sudo apt-get install -y libusb-1.0-0-dev libudev-dev pkg-config libsdl2-dev:i386 libsdl2-image-dev:i386 mtools
+        echo "PKG_CONFIG_PATH=/usr/lib/i386-linux-gnu/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}" >> $GITHUB_ENV
       shell: bash
     - name: Setup Zephyr project
       uses: zephyrproject-rtos/action-zephyr-setup@v1