[scudo] Fix the format of getStats() (#121608)

This is a quick fix for b71c44b9be17dc6295eb733d685b38e797f3c846

"last released" was removed by accident in primary64.h and the update of
"NumReleasesAttempted" was missing.

GitOrigin-RevId: a8d2aeec8732c8d158f5b194a5191c0805bcd961
1 file changed