firmware: run autoremove on minor operations

Bring back parts of f9e71141 in order to do an autoremove on
minor operations.  We still don't want the cleanup, but at
least since we have migrated to the vital flag we can be
sure that our GUI is not being purged.

src/opnsense/scripts/firmware/install.sh

 #!/bin/sh
 
-# Copyright (C) 2015-2016 Franco Fichtner <franco@opnsense.org>
+# Copyright (C) 2015-2017 Franco Fichtner <franco@opnsense.org>
 # Copyright (C) 2014 Deciso B.V.
 # All rights reserved.
 #
@@ -33,4 +33,5 @@ PACKAGE=$1
 
 echo "***GOT REQUEST TO INSTALL: $PACKAGE***" >> ${PKG_PROGRESS_FILE}
 pkg install -y $PACKAGE >> ${PKG_PROGRESS_FILE} 2>&1
+pkg autoremove -y >> ${PKG_PROGRESS_FILE} 2>&1
 echo '***DONE***' >> ${PKG_PROGRESS_FILE}

src/opnsense/scripts/firmware/reinstall.sh

 #!/bin/sh
 
-# Copyright (C) 2015-2016 Franco Fichtner <franco@opnsense.org>
+# Copyright (C) 2015-2017 Franco Fichtner <franco@opnsense.org>
 # Copyright (C) 2014 Deciso B.V.
 # All rights reserved.
 #
@@ -33,4 +33,5 @@ PACKAGE=$1
 
 echo "***GOT REQUEST TO REINSTALL: $PACKAGE***" >> ${PKG_PROGRESS_FILE}
 pkg install -yf $PACKAGE >> ${PKG_PROGRESS_FILE} 2>&1
+pkg autoremove -y >> ${PKG_PROGRESS_FILE} 2>&1
 echo '***DONE***' >> ${PKG_PROGRESS_FILE}

src/opnsense/scripts/firmware/remove.sh

 #!/bin/sh
 
-# Copyright (C) 2015-2016 Franco Fichtner <franco@opnsense.org>
+# Copyright (C) 2015-2017 Franco Fichtner <franco@opnsense.org>
 # Copyright (C) 2014 Deciso B.V.
 # All rights reserved.
 #
@@ -33,4 +33,5 @@ PACKAGE=$1
 
 echo "***GOT REQUEST TO REINSTALL: $PACKAGE***" >> ${PKG_PROGRESS_FILE}
 pkg remove -y $PACKAGE >> ${PKG_PROGRESS_FILE} 2>&1
+pkg autoremove -y >> ${PKG_PROGRESS_FILE} 2>&1
 echo '***DONE***' >> ${PKG_PROGRESS_FILE}