util/abuild: Add more error handling for command line options

- Show an error if a directory is added after the command line options
to catch scripts using the old parameters.
- If an invalid parameter is specified, show the parameter.

Change-Id: Ie8948361f1c51e89a99bdb13df8c554747cd521d
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/17741
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/abuild/abuild

@@ -676,10 +676,13 @@ while true ; do
 			configoptions="$(cat "$1")${configoptions}\n"
 			shift;;
 		--)		shift; break;;
-		-*)		printf "Invalid option\n\n"; myhelp; exit 1;;
+		-*)		printf "Invalid option '%s'\n\n" "$1"; myhelp; exit 1;;
 		*)		break;;
 	esac
 done
+if [ -n "$1" ]; then
+	printf "Invalid option '%s'\n\n" "$1"; myhelp; exit 1;
+fi
 
 if [ -z "$TARGET" ] || [ "$TARGET" = "/" ]; then
 	echo "Please specify a valid, non-root build directory."