add regenerate mplabx makefiles before make

Author: JacobBarthelmeh

.github/workflows/xc32-sftp.yml

@@ -69,5 +69,7 @@ jobs:
 
       - name: Build wolfssh library
         working-directory: wolfssh/ide/mplabx/wolfssh.X
-        run: make
+        run: |
+          /opt/microchip/mplabx/mplab_platform/bin/prjMakefilesGenerator.sh .
+          make