"exclude" will NOT work SOMETIMES when there are tons of files in project

# background
my h5 page is in the same project when my web page, I only use **pxtorem** in my h5 page, exclude all my web page.

# the bug
it works well in my localhost, but in the online environment which is build with jenkins, web page is using rem **sometimes**, not always.

After I rebuild on jenkins, it works well again.

It is hard to create a large project to reproduct this bug.