fix build process

Added the build changes by @Tony763 to fix the latest failures.

Requested by @krisgesling MycroftAI#89 (comment)

.github/workflows/build.yml

@@ -64,7 +64,7 @@ jobs:
       # Section with prerequisite installations
 
       - name: Github Actions - Get path to python
-        run: echo "PATH_TO_PYTHON=$(which python)" >> $GITHUB_ENV
+        run: echo "$(whereis python)" >> $GITHUB_PATH
 
       - name: Github Actions - Get repository name
         run: echo "REPOSITORY_NAME=$(echo '${{ github.repository }}' | awk -F '/' '{print $2}')" >> $GITHUB_ENV
@@ -87,7 +87,7 @@ jobs:
           git clone https://github.com/MycroftAI/mycroft-core.git /opt/mycroft-core
           ls /opt
           chmod +x /opt/mycroft-core/dev_setup.sh
-          /opt/mycroft-core/dev_setup.sh --allow-root -ci -sm -p ${{ env.PATH_TO_PYTHON }}
+          /opt/mycroft-core/dev_setup.sh --allow-root -ci -sm
           source ${{ env.MYCROFT_VENV }}
           /opt/mycroft-core/bin/mycroft-pip install -r ${{ github.workspace }}/requirements.txt
           /opt/mycroft-core/bin/mycroft-config set tts.module dummy