Ignore files auto-generated by the build process for debian packages

.gitignore

@@ -40,4 +40,11 @@ tests/stamp-h2
 doc/*.html
 doc/*.3
 doc/*.7
-
+debian/*.log
+debian/*.debhelper
+debian/*.substvars
+debian/files
+debian/libmodbus-dev/
+debian/libmodbus5/
+debian/stamp-*
+debian/tmp/