add more style checks

.github/checks/lastline.sh

@@ -0,0 +1,22 @@
+#! /bin/bash
+OLDCWD=`pwd`
+SCRIPT_PATH=`dirname $0`
+cd $SCRIPT_PATH/../../
+
+nl='
+'
+nl=$'\n'
+FILES=`find $CHECK_PATH -type f \( \( -name \*.inc -a \! -name Makefile.inc \) -o -name \*.cfg -o -name \*.c -o -name \*.s -o -name \*.h -o -name \*.asm -o -name \*.sgml \) -print | while read f; do
+    t=$(tail -c2 $f; printf x); r1="${nl}$";
+    [[ ${t%x} =~ $r1 ]] || echo "$f"
+done`
+
+cd $OLDCWD
+
+if [ x"$FILES"x != xx ]; then
+    echo "error: found following files that have no newline at the end:"
+    for n in $FILES; do
+        echo $n
+    done
+    exit -1
+fi