If the file does not have Unix line endings then the regular expression
in oci_native_moodle_database::attempt_oci_package_install() does
not split it correctly.
This leads to an invalid package being created in Oracle.
The .gitattribute file changes for oci_native_moodle_package.sql
force it to have Unix style line endings when the branch is checked
out and the file does not already exist.
The file has been modified so that the Unix style line endings are
applied even if the file already exists, for example when pulling in
this change to an existing branch.
