gitignore: optimize items

1. explicitly enumerate indirect wrap files so they are ignored
2. add a missing test target via autoconf
3. add devtool modify files

Tested: local files on my workstation are ingored correctly

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: I73b2fd1e8e91d7147c27bbf9bbcc970255dac6ac
1 file changed