Disable automatic sorting for new quarterly status reports.

While preparing the last quarterly status report (2019Q4), Makefiles were
added in the git repository that make it very easy to sort the project
reports. However, our report.xsl file enforces automatic alphabetical
sorting in each category, which destroys our manual sorting.

This patch disables automatic sorting starting with this quarter (2019Q4).
Automatic sorting is kept for older reports: we avoid to change them since
they have no designed and reviewed manual sort.

Submitted by: salvadore@
Approved by: bcr@
Differential Revision: https://reviews.freebsd.org/D23175