file-utils-test: application/x-zerosize is a valid mime for an empty file
As per GLib commit 1c177ce0, empty files might have application/x-zerosize
mime-type.
So, accept both this one and "text/plain" as valid.
As per GLib commit 1c177ce0, empty files might have application/x-zerosize
mime-type.
So, accept both this one and "text/plain" as valid.